Answer:
Assuming a 90% confidence level, the margin of error is approximately
0.3
Which of the following gives the confidence interval?
between 20.3 and 20.9
Explanation:
A survey of 225 students showed the mean number of hours spent studying per week was 20.6 and the standard deviation was 2.7, the margin of error is approximately 0.2948.
What is standard deviation?Standard deviation is a statistical measure that describes the amount of variation or dispersion of a set of data values.
It measures the average amount of deviation of each data point from the mean (or average) of the entire dataset.
To find the margin of error for a sample mean, we use the formula:
Margin of error = z * (standard deviation / sqrt(sample size))
where z is the z-score corresponding to the desired confidence level. For a 90% confidence level, the z-score is 1.645 (we can look this up on a standard normal distribution table).
Plugging in the values given in the problem:
Margin of error = 1.645 * (2.7 / sqrt(225))
= 1.645 * (2.7 / 15)
= 0.2948 (rounded to four decimal places)
Therefore, the margin of error is approximately 0.2948.
For more details regarding error, visit:
https://brainly.com/question/30524252
#SPJ5
Which of these could influence a persons biological
Franz is working hard to finish a draft of his short story. He's been working all day. By 5:00, though, he is so hungry that he must stop working and find something to eat. After he eats a sandwich, he goes back to work and finishes the draft of the story. Which motivation theory is most applicable to this situation?
Yerkes-Dodson law is the motivation theory which is most applicable to this situation.
What is Yerkes-Dodson law?This is defined as a model of the relationship between stress and task performance.
In this scenario, he he reached his peak performance with a level of stress which was hunger. This was why he paused to ease the stress by eating before continuing with the story.
Read more about Yerkes-Dodson law here https://brainly.com/question/3487544
#SPJ1
What is the main idea of this passage? the green revolution solved one problem but created new ones. The green revolution reduced the risk of political conflict. The green revolution has resulted in decreased pollution. The green revolution has contributed to lack of food quality and nutrition
Answer:
its A
Explanation:
Answer:
A on e2022
Explanation:
Please give branliest.
Why did the united states use export controls with north korea brainly
Answer:
C. to stop the development of nuclear weapons
Explanation:
Just took the test
When 70. G of li3n(s) (molar mass 35 g/mol) reacts with excess h2(g), 8. 0 g of lih(s) is produced. The percent yield is closest to
Answer:
25%
Explanation:
Li3N(s) + 2 H2(g) ⇄ LiNH2(s) + 2 LiH(s)
70 g Li3N x 1 mol Li3N/35 g = 2 mol Li3N
2 mol Li3N x 2 mol LiH/1 mol Li3N
= 4 mol LiH x 7.05 g LiH/1 mol LiH = 28.20
percent yield = actual yield/theoretical yield x 100
8 g / 28.20 g ≈ 28%
28% is closest to 25% ap classrom
When 70. G of li3n(s) (molar mass 35 g/mol) reacts with excess h2(g), 8. 0 g of lih(s) is produced. The percent yield is 25%.
What is the percent yield?The actual yield is calculated as the theoretical yield multiplied by 100 to get the percent yield. There are a variety of reasons why a chemical reaction's actual yield could be lower than its theoretical yield, and they will be covered in more detail in later chapters of the course.
Li₃N(s) + 2 H₂(g) ⇄ LiNH₂(s) + 2 LiH(s)
70 g Li₃N x 1 mol Li₃N/35 g = 2 mol Li₃N
2 mol Li₃N x 2 mol LiH/1 mol Li₃N
4 mol LiH x 7.05 g LiH/1 mol LiH = 28.20
Percent yield = actual yield/theoretical yield x 100
8 g / 28.20 g = 28%
28% is closest to 25%
Therefore, the percent yield is 25%.
To learn more about percent yield, refer to the link:
https://brainly.com/question/12704041
#SPJ2
Lesson 4 skills practice properties of similar polygons
Two polygons are similar if corresponding side lengths have equal scale factor
The polygons are not similar
How to determine if the polygons are similar?From the complete question, we have two polygons with the following corresponding side lengths:
5 and 812 and 1513 and 17Calculate the scale factor (k) using:
k = Polygon B/Polygon A
So, we have:
k = 8/5 = 15/12 = 17/13
Evaluate the quotients
k = 1.60 = 1.25 = 1.31
The factors are not equal i.e.
1.60 ≠ 1.25 ≠ 1.31
Hence, the polygons are not similar
Read more about similar shapes at:
https://brainly.com/question/14285697
What features do proteins and nucleic acids have in common? select all that apply.
Answer:
carbon, hydrogen, oxygen, nitrogen
Explanation:
not sure if these were options or not but I think this is the answer
In which step did shawna make an error? step 1. she incorrectly applied the pythagorean theorem. step 2. she incorrectly squared the numbers. step 3. she incorrectly isolated a2 step 4. she incorrectly solved for a.
The step in which Shawna make an error is in; Step 2; She incorrectly squared the numbers.
How to solve pythagoras theorem?From the given triangle in the brainly link, we can deduce the correct steps through pythagoras theorem as:
Step 1; a² + 7² = 25²
Step 2; a² + 49 = 625
Step 3; a² = 576
Step 4; Taking square roots of both sides of step 3 gives us;
a = 24
Thus, the step in which Shawna make an error is in Step 2 because She incorrectly squared the numbers.
Read more about Pythagoras Theorem at; https://brainly.com/question/11280246
Answer:
step 2
Explanation:
i got it right
Choose the best translation of the following sentence. as for me, i don't know. por mi parte, no sé. para siempre, no sé. para que sepas, no sé. por ejemplo, no sé.
The best translation of the following sentence "as for me, i don't know" we have that will be "por mi parte, no sé".
This will be the correct translation because when we look at the translation of the other options we have that they correspond to :
"para siempre, no sé" wil correspond to "forever i don't know""para que sepas, no sé" will correspond to "just so you know, i don't know""por ejemplo, no sé" will correspond to "for example, I don't know."In this way, the translation that best suits is "por mi parte, no sé".
See more about translation at brainly.com/question/11914505
Answer:
A-Por mi parte, no sé. :)
Explanation:
good luck :)
If the radius of a circle is 3. 5 inches, its diameter is inches and its approximate area is square inches
Answer: 7 Inches
Explanation:
Diameter = 7 inches
Area of circle is 38.46 inches²
Step-by-step explanation:
Given :The radius of a circle is 3.5 inches.
We have to find its diameter and area.
Since diameter is twice of radius.
So radius = 3.5 inches
Diameter = 2× 3.5 inches = 7 inches
Area of circle =
Substitute, r = 3.5
Area of circle = (3.5)
Simplify , we have,
Area of circle = 12.25
Using π = 3.14
We have,
Area of circle = 38.465
Thus, Area of circle is 38.46 inches²
What do nuclear fission and fusion have in common?
Answer:
Fusion and fission are similar in that they both release large amounts of energy. Nuclear fusion is a process in which two nuclei join to form a larger nucleus. Nuclear fission is a process in which a nucleus splits into two smaller nuclei
There are 3 white marbles and 7 blue marbles in a bag
Answer:
what are we supposed to do we I need the whole question to answer your questions
Explanation:
Andrea has $500 in the bank that she wants to invest in the stock market. she also wants to add $50 per month into this account from her part-time job. which is the best way for andrea to build up a diversified portfolio of stocks?
The best way for andrea to build up a diversified portfolio of stocks is; by putting her money into dollar-cost averaging.
What is dollar-cost averaging?Dollar-cost averaging is defined as an investment strategy in whereby the individual periodically purchases target assets or invests in a certain portion of funds in one security.
This therefore tells us that Dollar-cost averaging would reduce the risk tolerance associated with purchasing large stock securities.
Thus, we can recommend dollar cost averaging as the best way for andrea to build up a diversified portfolio of stocks.
Read more about stocks at; https://brainly.com/question/14360614
A spinner has three sections colored green, purple, and pink. if the spinner is spun three times, how many possible outcomes are there?
Answer:
27
Explanation:
The Counting Principle states that the number of possible outcomes is equal to the product of the number of outcomes for each event. In this case, (M)(N)(O).
Answer:
27
Explanation:
The Counting Principle states that the number of possible outcomes equals the product of the number of outcomes for each event. In this case, (M)(N)(O).
Use the model here to describe the transfer of matter and flow of energy from one trophic level to another within an ecosystem. All of the following must be addressed in your response to receive full credit: a. Discuss the transfer of biomass when one organism eats another. Use your knowledge of digestion to discuss how food is broken down and used by the consumer. B. Explain what happens to the energy that is not transferred from one organism to another. C. Explain why there are typically fewer organisms at the top of an energy pyramid. D. Use specific numbers and calculations to support your explanation
The model here is not found here but matter and energy flow in the food pyramid from lower trophic levels to higher trophic levels.
What is a food pyramid?A food pyramid is a diagram that represents the trophic relationships between species in a given ecosystem.
Biomass can be transferred when one organism eats another because life forms are composed of macronutrients such as proteins, carbohydrates and fats (lipids).
Digestion is a metabolic process where larger macronutrients are degraded onto smaller components that can be used to build body structures.
Learn more about the food pyramid here:
https://brainly.com/question/26876911
#SPJ1
A parallel circuit with a 20-ohm resistor and a 10-ohm resistor.
Considering the circuit described, it is found that the equivalent resistance is of 6.67 ohms.
What is the equivalent resistance of two resistors in parallel?It is given by the product divided by the sum of the resistances of the two resistors.
In this problem, the resistances are of 20-ohms and 10-ohms, hence:
EQr = (20 x 10)/(20 + 10) = 200/30 = 6.67 ohms.
The equivalent resistance is of 6.67 ohms.
More can be learned about equivalent resistance at https://brainly.com/question/15121871
If lydia can type 80 words in two minutes , how long will it take lydia to type 600 words?
Use an online thesaurus to improve the quality of this paragraph. Make at least three changes. Antonio was a very good basketball player. During antonio’s best game, he scored 52 points for his team. During the game the crowd was very happy for antonio. After the game, the principal gave antonio a big trophy for breaking the school’s scoring record
Answer: Student answers will vary. Words that may be substituted with synonyms from a thesaurus include: best, during, good, happy, gave, big
Explanation:
Just from reading this excerpt, what could you say about him? do you find him serious? do you think he is funny? why?
Answer:
I am having an interesting time with my friend, Don Quixote, on our adventures. He is a bit silly, as he believes he is a knight on a quest. Just yesterday he attacked a windmill because he thought it was a giant. [ I had better stay with him though - he might get into some serious trouble if he doesn't have someone to watch out for him. I don't know when I will be able to return home. Your friend, Sancho. ]
Explanation:
i just did the assignment
the millions of bacteria, viruses, and other microorganisms that reside in your stomach and small and large intestines and play an active role in digestion and metabolism is your gut
The bacteria, viruses and other microorganisms that reside in the stomach and small and large intestines play an active role in digestion and metabolism: true.
What is digestion?Digestion refers to a form of catabolic activity that is used by the body of a living organism for the break down of food into smaller sizes that can be absorbed as essential nutrients, while energy is released through the process.
Basically, the millions of bacteria, viruses and other microorganisms that reside in the stomach and small and large intestines of a living organism plays an active role in digestion and metabolism and they are mainly found in the gut microbiome.
Read more on disgestion here: brainly.com/question/22686081
Three ways in which the media often fails to fulfil their responsibilities on society
Answer:
1. When the media presents material to the public at random without verifying it.
2. A circumstance in which the media spreads misleading information while omitting to include the key facts that go along with it.
3. When the media tries to draw conclusions by comparing disparate subjects or topics.
To know more about Media responsibilities, refer below
brainly.com/question/1237433
Explanation:
In the passage, whitman uses the word to create positive feelings and associations with safety.
Answer: C habor
Explanation:
In the passage, Whitman uses the word "harbor" to create both positive feelings and associations with safety in the mind of his readers.
What is an inference?An inference is a process through which a reader deduces the meaning of a word and information that are associated with a passage written by a writer (author) of a literary work, especially through induction.
Based on the passage, we can infer and logically conclude that Whitman used the word "harbor" to create both positive feelings and associations with safety in the mind of his readers.
Read more on inference here: https://brainly.com/question/11496600
#SPJ2
8-3 practice multiplying polynomials answers with work
An example of practice multiplying polynomials is to find the produce of (q + 6)(q + 5)
What is the polynomials about?A polynomial is known to be any given expression that is made up of indeterminates or variables.
To find the product of :
(q + 6)(q + 5), you have to collect like terms.
After that , the answer will be
q2 + 11q + 30
Therefore, q2 + 11q + 30 is the product of the above equation.
Learn more about polynomials from
https://brainly.com/question/2833285
#SPJ1
This scientist first organized the known elements by atomic weight and once organized, hypothesized that specific characteristics showed up periodically among the elements. The scientists is a) mendel b) mendeleev c) miller d) moseley
A referee moves along a straight path on the side of an athletic field
Answer:
yes thats true becouse thats were the refrees operate
Light is an electromagnetic wave. which characteristic is common in all electromagnetic waves in a vacuum?
All electromagnetic waves: are transverse waves; can travel through a vacuum ; travel at exactly the same speed in a vacuum, the speed of light, 300,000,000 m/s.
A parabola has the following properties. Vertex at (–2, 1) directrix is x = 5 which equation represents this parabola?
Answer:
C
Explanation:
Edge 22'
Determine whether the sequence converges or diverges
Answer:
If limn→∞an lim n → ∞ exists and is finite we say that the sequence is convergent.
Explanation:
The distance between two piers on a river is 45 miles
Answer:
it takes a motorboat, moving downriver, 2 hours 15 minutes to complete the journey.
It is widely known in kevin's social club that he is the most stubborn and inflexible member. kevin complains that all his friends and members in the club are too opinionated. if his attitude is attributed to his personality, what type of factors are impacting his behavior? dispositional factors false factors reactional factors true factors situational factors
The type of factors are impacting Kevin's behavior is dispositional factors.
What are dispositional factors?Dispositional Factors is a term that is often known as Internal Factors. They are known to be a specific individual attribute that affects a person's behavior and actions.
They can be personality traits, temperament, etc. In the scenario above, Kevin is known to be stubborn and inflexible and thus this attributes are impacting his behavior.
Learn more about behavior from
https://brainly.com/question/16368786