A quality control engineer is testing the battery life of a new smartphone. the company is advertising that the battery lasts 242424 hours on a full charge, but the engineer suspects that the battery life is actually less than that. they take a random sample of 303030 of these phones to test h_0: \mu=24h 0 ​ :μ=24h, start subscript, 0, end subscript, colon, mu, equals, 24 hours versus h_\text{a}: \mu < 24h a ​ :μ<24h, start subscript, start text, a, end text, end subscript, colon, mu, is less than, 24 hours, where \muμmu is the mean battery life of these phones. the sample data had a mean of 212121 hours and a standard deviation of 161616 hours. these results produced a test statistic of t\approx-1.03t≈−1.03t, approximately equals, minus, 1, point, 03 and a p-value of approximately 0.1560.1560, point, 156. assuming the conditions for inference were met, what is an appropriate conclusion at the \alpha=0.10α=0.10alpha, equals, 0, point, 10 significance level?

Answers

Answer 1

The appropriate conclusion of the hypotheses is that; there is insufficient evidence to support the claim that the mean battery life not up to 24 hours.

What is the Conclusion of the Hypothesis?

We are given;

Null Hypothesis; H₀: μ = 24

Alternative Hypothesis; Hₐ: μ < 24

We are aslo given that;

Significance level; α = 0.10

test statistic; t = 1.03

p-value = 0.156

Now, we see that our p-value is greater than the significance value and as such since the alternative hypothesis is the claim we will fail to reject the null hypothesis and conclude that there is insufficient evidence to support the claim that the mean battery life not up to 24 hours.

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Related Questions

Jkl will be rotated 90 degrees clockwise around the origin to form jkl

Answers

JKL will be rotated 90 degrees clockwise around the origin to form J'K'L' using the rule (x, y) ⇒ (y, -x).

What is transformation?

Transformation is the movement of a point from its initial location to a new location. Types of transformation are rotation, reflection, translation and dilation.

JKL will be rotated 90 degrees clockwise around the origin to form J'K'L' using the rule (x, y) ⇒ (y, -x).

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Jiminy’s cricket farm issued a 30-year, 6 percent semiannual bond three years ago. the bond currently sells for 93 percent of its face value. the book value of the debt issue is $95 million. in addition, the company has a second debt issue on the market, a zero coupon bond with eight years left to maturity; the book value of this issue is $40 million, and the bonds sell for 67 percent of par. the company’s tax rate is 22 percent. a. what is the company’s total book value of debt? (enter your answer in dollars, not millions of dollars, e.g. 1,234,567.) b. what is the company’s total market value of debt? (enter your answer in dollars, not millions of dollars, e.g. 1,234,567.) c. what is your best estimate of the aftertax cost of debt? (do not round intermediate calculations and enter your answer as a percent rounded to 2 decimal places, e.g., 32.16.)

Answers

The company’s total book value of debt is $135,000,000 and  the company’s total market value of debt is :$115,150,000.

Total book value of debt and Total market value of debt

a. Book value of debts

Book value of debts=Book value of debt issue+Book value of this issue

Book value of debts= $95,000,000 + $40,000,000

Book value of debtsB =$135,000,000

b. Total market value of debt

Total market value of debt=[(.93)($95,000,000) + (.67)($40,000,000)]

Total market value of debt= $88,350,000+$26,800,000

Total market value of debt= $115,150,000

Therefore the company’s total book value of debt is $135,000,000 and  the company’s total market value of debt is :$115,150,000.

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You have planned purchases of $4,000. You have received orders that total $2,300, and you have ordered merchandise that totals $700. Calculate the open-to-buy amount

Answers

The open-to-buy amount given the total planned purchases, received orders and ordered merchandise is $1,000

How to calculate the open to buy amount?

Total planned purchase = $4,000Received orders = $2,300Ordered merchandise= $700

open-to-buy amount = Total planned purchase - (Received orders + Ordered merchandise)

= 4000 - (2,300 + 700)

= 4000 - 3,000

= 1,000

Therefore,

open-to-buy amount = $1,000

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Why should i wrap my door knobs in aluminum foil when i'm home alone

Answers

The reason why one should wrap a door knobs in aluminum foil when one is home alone is to hinder (prevent) the door from latching.

What is the use of aluminum foil?

An Aluminum foil is known to be a type of foil that helps to give a surface or object a form of full barrier against light, oxygen, etc.

Note that the foil is often used in food and also in pharmaceutical and the reason why one should wrap a door knobs in aluminum foil when one is home alone is to hinder (prevent) the door from latching.

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Based on the audio, what made the natural disaster worse after the disaster? the showers the smoke the storm the wind

Answers

Based on the audio recording, the smoke made the natural disaster worse after it ended.

What is a natural disaster?

A natural disaster refers to a natural occurrence that is beyond human control. Also, it's typically characterized by injuries, death or severe damage to both the living and non-living organisms staying within the impacted environment.

Based on the audio recording, we can deduce that a wildfire occured and as such the smoke produced thereafter, made the natural disaster worse even after it ended.

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Answer:

The Smoke

Explanation:

i got it right on flvs

Which type of program is the spanish equivalent of a soap opera

Answers

Answer:

Telenovela

Explanation:

A telenovela is a type of a television serial drama or soap opera produced primarily in Latin America.

[The word combines tele (for "television") and novela (meaning "novel") ]

The shape of mercury can be approximated by a sphere with a diameter of 4880 kilometers. find the surface area and the volume of mercury. for surface area, round your answer to the nearest tenth of a million. for volume, round your answer to the nearest tenth of a billion.

Answers

The surface area and the volume of mercury whose shape can be approximated by a sphere is 7.5ˣ10⁷ squared km and 6.1ˣ10¹⁰ cubed km respectively.

What is of volume of sphere?

Volume of sphere is the amount of quantity, which is obtained by the it in the 3 dimensional space.

The volume of the sphere can be given as,

[tex]V=\dfrac{4}{3}\pi r^3[/tex]

The surface area of a sphere  can be calculated with the following formula,

[tex]A_s=4\pi r^2[/tex]

Here, (r) is the radius of the sphere.

The shape of mercury can be approximated by a sphere with a diameter of 4880 kilometers. The radius of it is the half of the diameter. Thus,

[tex]r=\dfrac{4880}{2}\\r=2440[/tex]

Thus, the surface area of it is,

[tex]A_s=4\pi (2440)^2\\A_s\approx7.5\times10^7\rm \; km^2[/tex]

The volume of the mercury is,

[tex]V=\dfrac{4}{3}\pi r^3\\V=\dfrac{4}{3}\pi (2440)^3\\V\approx6.1\times10^{10}\rm\; km^3[/tex]

Thus, the surface area and the volume of mercury whose shape can be approximated by a sphere is 7.5ˣ10⁷ squared km and 6.1ˣ10¹⁰ cubed km respectively.

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Luther operates an upscale restaurant in a wealthy golf club community. he actively discourages individuals who do not live in the neighborhood from making reservations even though the restaurant itself is public. luther's behavior is best described as an example of

Answers

Luther's behavior of actively discouraging certain individuals from making reservations is best described as an example of discrimination.

What is discrimination?

Discrimination refers to a terminology that is primarily used to connote or describe a behavior that is characterized by an unfair and prejudicial treatment of certain individuals or group of people based on any of the following factors:

WealthSocial statusSe×ual orientationGenderAgeRace (color)

In conclusion, we can deduce that Luther's behavior of actively discouraging certain individuals from making reservations is best described as an example of discrimination.

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Is the chemical process plants go through in order to make their own food.

Answers

Photosynthesis because it allows the plant to produce sugars from sunlight.

Answer:

Your answer is photosynthesis.

Explanation:

Photosynthesis is the process when plants use the sun's sunlight to convert it to chemical energy. They store the chemical energy somewhere and use it later. Then, plants use that same chemical energy to make their food in order to grow.

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Which set of conditions best describes the weather at the area of lowest air pressure?

Answers

It overcast skies with strong winds PLATO!!

Which three statements accurately describe the populist party?

Answers

✏Answer ✏

Many farm protest organizations joined the Populist Party in 1892.The Populist Party supported a Free Silver currency policy.Republican voters were drawn to the Populist Party’s platform.The Populist Party wanted more government regulation.

Explanation:

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Which atom is bonded to the carbon atom in the functional group of a ketone?

Answers

i think it is oxygen

The united states postal service charges $0.55 to mail a first-class letter that weighs up to 1 ounce. each additional ounce costs $0.15. which equation represents the situation?

Answers

The equation that best represents the situation is =

y=0.15[x]+0.55

The equation for the postal service charges

The amount that is charged for 1 ounce first-class letter=$0.55

The cost for any additional ounce = $0.15

Let X represent the additional ounce.

The total price which is represented by y should be=0.15[x]+0.55

Therefore, the equation that best represents the situation is y=0.15[x]+0.55

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Answer:

d

Explanation:

Based on the sign of the standard cell potential, ????∘cell, classify these reactions as spontaneous or nonspontaneous as written. assume standard conditions. refer to the list of standard reduction potentials.

Answers

For a cell reaction to be sponteanous, the  standard cell potential must be positive.

What is a sponteanous cell reaction?

We define a cell reaction as sponteanous when the value of the standard cell potential is positive. If the standard cell potential is negative then the reaction is not sponteanous.

The question here is incompete but we know that the reactions that are sponteanous will all have a positive  standard cell potential.

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Which best explains why companies use celebrities to endorse their products? to develop a brand to copy other companies to influence consumers to justify a quality claim

Answers

Answer:

its C

Explanation:

or is it

Answer:

CCCc

Explanation:

Every since i read that book on manners, i can't help but notice peoples' awful behavior at the dinner table.

Answers

Answer:

Ever since i read that book on manners, i can't help but notice peoples awful behavior at the dinner table.

Explanation:

change the "every" into ever and "peoples' "  into peoples

What is the ratio of the kinetic energy of an object of mass 3m moving at speed 2v to an object of mass m/2 moving at a speed v?

Answers

The ratio of kinetic engery between two objects having mass as 3m and m/2 along with the speed of 2v is 6.

What is kinetic energy?

A kinetic energy is the engery generated by the movement or the motion of the moving objects. It is required for the acceleration of the moving body or the object.

Computation:

[tex]\begin{aligned}\dfrac{(\text{KE})_1}{(\text{KE})_2}&=\dfrac{\frac{1}{2}{m_1}\;{v_1^2}}{\frac{1}{2}{m_2}\;{v_2^2}}\\\\&=\dfrac{\frac{1}{2}{2m}\;{3v^2}}{\frac{1}{2}{3m}\;{v^2}}\\\\&=\dfrac{2\times9}{3}\\\\&=6\end{aligned}[/tex]

Therefore the ratio is 6.

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Earl's savings account has an apr of 7.3%, calculates interest daily, and pays interest at the end of the month. if during the month of june, his balance was $400 for the first 10 days of the month, $1500 for the next 10 days of the month, and $600 for the last 10 days of the month, how much total interest did earl earn in june?

Answers

Answer:

it’s D. $5.00

Explanation:

Answer:

$5.00

Explanation:

Got it right on the quiz.

Each of the following is a condition necessary for natural selection to occur except

Answers

Answer:

population size is very large population size is very large population size is very large

Explanation:

Population size is very large population size is very large population size is very large.

What is genetic drift?

Genetic drift is a mechanism of evolution in which allele frequencies of population change with generations due to chance (sampling error). Genetic drift occurs in all the populations of non-infinite size, but its effects are the strongest in small populations.

Genetic drift occurs in small populations, where infrequently-occurring alleles faces greater chance of being lost. Once it begins, genetic drift continues until the involved allele is either lost by population or is the only allele present at particular gene locus within the population.

Genetic drift is primarily associated with small breeding populations and mutations are regarded as strong evolutionary mechanism for changing allelic frequencies.

Therefore, Population size is very large population size is very large population size is very large.

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Sketch the solid whose volume is given by the iterated integral.

Answers

A sketch of the solid whose volume is given by the iterated integral is shown in the image attached below.

How to calculate an integral?

In this exercise, you're required to sketch the solid whose volume is given by the iterated integral below. Thus, we would first of all evaluate the integral so as to get a unit value.

Given the following integral:

∫¹₀∫₀¹(4 - x - 2y)dxdy

Integrating x with respect to y, we have:

∫¹₀∫₀¹(4 - x - 2y)dxdy = ∫¹₀[(4 - (1/2)- 2y)]dy

∫¹₀∫₀¹(4 - x - 2y)dxdy = 4y - (y/2) - (2y²/2)|¹₀

Evaluating the integral, we have:

∫¹₀∫₀¹(4 - x - 2y)dxdy = 4(1) - (1/2) - (2(1)²/2)

∫¹₀∫₀¹(4 - x - 2y)dxdy = 4 - 1/2 - 1

∫¹₀∫₀¹(4 - x - 2y)dxdy = 5/2

In conclusion, a sketch of the solid whose volume is given by the iterated integral is shown in the image attached below.

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If c=3,6 and d=4,8. the coordinate of the point of cd is

Answers

The coordinate of CD is the position of CD

The coordinate of the midpoint of CD is (3.5, 7)

How to determine the coordinate of CD?

The coordinates are given as:

C = (3,6)

D = (4,8)

Next, we calculate the midpoint of CD using the following midpoint formula

CD = 0.5 * (x₁ + x₂, y₁ + y₂)

So, we have:

CD = 0.5 * (3 + 4, 6 + 8)

Evaluate the sum

CD = 0.5 * (7, 14)

Evaluate the product

CD = (3.5, 7)

Hence, the coordinate of the midpoint of CD is (3.5, 7)

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Use the sentence to complete the activity. talk to them, and you should tell them the truth. in 1–2 sentences, identify the shift in mood and rewrite the sentence correctly.

Answers

The rewritten form of the sentence is "Tell them the truth when you talk to them".

What is a shift in mood?

A shift in mood is known to be found  a sentence that uses a two or more mood.

An example: Wash your teeth if you want to eat dinner. Note that this sentence began an imperative phrase and then later by a conditional mood as in the case above.

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An airplane flies at an altitude of 5 miles toward a point directly over an observer consider and x

Answers

Ava ran at an average speed of 6 miles per hour while Kelly ran at an average speed of 8 miles per hour, both would be 3/4 mile apart after 45/14 minutes

What is an equation?

An equation is an expression that shows the relationship between two or more numbers and variables.

Trigonometric ratio is used to show the relationship between the sides and angles of a right angled triangle.

From the diagram:

tan(θ) = 5/x

The relationship between the angle θ and the horizontal distance (x) is tan(θ) = 5/x

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What does lady bracknell say that makes light of marriage in this excerpt

Answers

Answer:

um is there supposed to be text?

Explanation:

A person buying a personal computer system is offered a choice of three models of the basic unit, two models of keyboard, and two models of printer. how many distinct systems can be purchased?

Answers

The number of distinct computer systems that this person can purchase is equal to twelve (12).

Given the following data:

Number of basic units = 3 models.Number of keyboard = 2 models.Number of printers = 2 models.

How to calculate the number of distinct systems.

In order to determine the number of distinct computer systems that this person can purchase, we would use a mathematical model referred to as combination.

Mathematically, combination is given by this mathematical equation:

[tex]_nC_r = \frac{n!}{r!(n-r)!}[/tex]

Where:

n is the number of items.r is the number of times of choosing items.

Substituting the given parameters into the formula, we have;

³C₁ × ²C₁ × ²C₁ = 3 × 2 × 2

Distinct systems = 12.

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What is the measure of ∠x? round your final answer to the nearest tenth, if necessary. 12.6º 21.8º 62.8º 82.2°

Answers

Using sine law, the measure of angle x in the triangle XYZ to the nearest tenth of degree is 82.2 degrees.

How to use sine law?

Sine law formula for triangle can be represented as follows:

ZY / sin X  = XY / sin Z

Therefore,

ZY = 38 cm

∠X  = ?

XY = 22 cm

∠Z = 35 degrees.

Hence,

38 / sin X = 22 / sin 35°

cross multiply

38 sin 35° = 22 sin X

38 × 0.57357643635 = 22 sin X

21.7959045813 = 22 sin X

divide both sides by 22

sin X = 21.7959045813 / 22

sin X = 0.99072293551

X = sin⁻¹ 0.99072293551

X = 82.1894927728

X = 82.2°

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Answer:

The answer is 82.2°.

Explanation:

Verified by correct test results.

Which system of equations can be used to find the roots of the equation ?

Answers

Answer:

the root of quadratic equation

What is the exact value of tan 30°? enter your answer, as a simplified fraction, by filling in the boxes.

Answers

Answer:

√3 / 3

Explanation:

Here,

tanx = sinx / cosx

By substituting the values , we get ,

tan ( 30 ) = 1/2

————

√3/2

Now,

By multiplying both numbers,

tan ( 30 ) = 1/√3

At Last,

Multiplying both numbers by square root 3,

tan ( 30 ) = √3/√3 * √3 = √3 / 3 . answer

Answer:

please see photo above for detailed analysis.

You _______ see stop signs on limited access highways.

Answers

Answer: You can expect to see no stop signs or traffic lights on limited access high way.

Explanation: Limited access roads have various name such as expressway, access highway. In case of limited access highway there is no stop signs or traffic lights.

Geometry worksheet 11.1-11.2 angles and arcs in a circle answer key

Answers

An example of Geometry worksheet  question is "What is the difference between a minor arc and a major arc".

What is an arc?

In Mathematics, the term “arc”  connote a type of circular shape or a curve that merges two endpoints.

The difference between a minor arc and a major arc" is that:

The measure of a minor arc is known to be less than 180°The measure of a major arc is known to be greater than 180°

Conclusively,  through the measurement of the arc, one can know if it is a major or a minor arc.

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