Mathematics College

pls answer what you can and I will give brainliest.

1. A population variance is used to calculate the t statistic for a hypothesis test.
(True/False)

2. Holding everything else constant, increasing the sample size (n) decreases estimated standard error (SM) and increases the likelihood of a significant result.
(True/False)

3. With = .01, a two-tailed t test for a sample of n = 20 subjects would have critical t boundary values of t = ±2.861
(True/False)

4. A sample of n = 15 scores would produce a t statistic of df = 16.
(True/False)

5. Using the single sample t statistic formula (M - divided by SM) for a hypothesis test: First, calculate the obtained t statistic for: M = 12, = 6, with SM = 2.

Second, find the critical t boundary values for the critical region in the t Distribution Table (p. 537).

Now, describe the decision regarding the null hypothesis for a two-tailed test with =.05 and df=8: _________.
(Reject Null Hypothesis/Fail to reject Null Hypothesis)

6. An independent-measures t test design could be used to evaluate the difference in verbal skills between 3-year old girls and 3-year old boys.
(True/False)

7. The null hypothesis for the independent-measures t test states that there is no difference between the two population means.
(True/False)

8. The homogeneity of variance assumption requires that the two samples have equal variances.
(True/False)

9. One sample has n = 6 and SS = 20, and a second sample has n = 6 and SS = 30. The pooled variance for the two samples is 50/10 = 5.
(True/False)

10. An independent-measures study uses a separate sample to represent each of the treatment conditions or populations being compared.
(True/False)

11. The goal of an independent measures research study is to evaluate mean differences between two populations (or treatment conditions).
(True/False)

12. For the difference scores: 3, -8, 6, -4, -2, the value of MD = -1.
(True/False)

13. A researcher obtains a t statistic of t = 2.00 from a repeated-measures study using n = 17 participants. If effect size is measured using r2, then r2 = 4/20 = 0.20
(True/False)

14. The repeated-measures t test design is suited to situations in which there are relatively few subjects available for study
(True/False)

15. The repeated-measures t test design is helpful because it uses fewer subjects for two samples.
(True/False)

16. The researcher’s goal for a repeated-measures t test is to use a sample of difference scores to answer questions about the general population, and particularly to find out if there is any difference between the two treatment conditions for the general population.
(True/False)

17. Independent observations are an assumption for the repeated-measures t test design.
(True/False)

18.
Two assumptions of the t test are: ________.

Assumption 1: ________

Assumption 2: ________

THANKS <3

Answers

Answer 1

Answer:

I believe the top one is true! I'm sorry I couldn't answer them all :c

Step-by-step explanation:

Related Questions

Figure B is a scale image of Figure A, as shown. Enter the scale factor applied to Figure A to produce Figure B.

Answers

The scale factor is 7. (Multiply each side by 7)

I need help with this question

Answers

The square root of 92 is approx. 9,6. So i suppose point P represents it better

Having trouble with this, help please?

Answers

Answer:

a) [tex]7x-15=20[/tex]

b)     [tex]\frac{20+15}{7}[/tex]

c)  [tex]5[/tex]

Step-by-step explanation:

The speed of the jet Alyssa flew on from Boston to London was 480 mph. On her return flight, the speed of the jet was 600 mph with a tail wind. What was Alyssa's average speed on the round trip? Round your answer to one decimal place.

Answers

Answer:

540

Step-by-step explanation:

Answer:

533.3mph

Step-by-step explanation:

Amy babysat 5 nights during the month of April. She earned $40, $30, $32, and $45 for four nights. How much did she earn the fifth time if the mean of the data is $37?

Answers

Answer:

$38

Step-by-step explanation:

[tex] \frac{40 + 30 + 32 + 45 + x}{5} = 37[/tex]

[tex] \frac{147 + x}{5} = 37[/tex]

[tex]147 + x = 185[/tex]

[tex]x = 38[/tex]

A builder wants to install a triangular window with the angles shown in the illustration. What angles will he have to cut to make the window fit? (Hint: The sum of the angles in a triangle equals 180°.)
x° =
°
(x + 30)° =
°

Answers

Answer:

X=40°

Step-by-step explanation:

40+30=70

40+30=70

70+70=140

140+40=180

The angles will builder has to cut to make the window fit is 40°, 70° and 70°.

Given that, the measures of the three angles of a triangle are x°, (x+30)° and (x+30)°.

What is the angle sum property of a triangle?

The sum of all internal angles of a triangle is always equal to 180°. This is called the angle sum property of a triangle.

Now, x°+(x+30)°+(x+30)°= 180°

⇒3x+60°=180°

⇒3x=180°-60°

⇒3x=120°

⇒x=40°

So, x°=40°,  (x+30)°= 70°

Therefore, the angles will builder has to cut to make the window fit is 40°, 70° and 70°.

To learn more about the angle sum property of a triangle visit:

https://brainly.com/question/8492819.

#SPJ2

Compute the value of the discriminant and give the number of real solutions of the quadratic equation. -9x to the second power-6x-1=0

Answers

Answer:
discriminant=0
Number of real solutions=1


Step-by-step explanation:

Given the equation:
-9x^2-6x-1=0
Let a: coefficient of x^2
Let b: coefficient of x
Let c: constant
a=-9
b=-6
c=-1
The formula of the discriminant is given by:
discriminant= b^2 - 4ac
discriminant= (-6)^2 - 4(-9)(-1)
= 36 - 36 = 0
We know that:
If discriminant<0 then the equation has no real root
If discriminant=0 the equation has one real root
If discriminant>0 the equation has 2 real roots

Here we got discriminant=0 so the quadratic equation has 1 real root.

Ronaldo's sisters eat the remaining slices of the first loaf of banana
bread. Write an inequality to compare the amount of banana bread that
Ronaldo and his friends ate to the amount his sisters ate

Answers

U didn’t give a lot of explanation

Explain why it is important to have a good credit history.

Answers

Answer:

A good credit score is used for more than just getting a credit card or a loan. Credit scores demonstrate your history of paying your debts to entities that loan you money. Due to extending themselves beyond their means, many people are not able to pay their debts

Tom has a gift box that is 3 units long, 6 units wide, and 12 units tall. What is the volume of the gift?

Answers

Answer:

216

Step-by-step explanation:

LxWxH fill it in 3x6x12=216

In order to qualify for a role in a play, an actor must be taller than 64 inches but shorter than 68 inches. The inequality 64 < x < 68, where x represents height, can be used to represent the height range. Which is another way of writing the inequality?

x > 64 and x < 68
x > 64 or x < 68
x < 64 and x < 68
x < 64 or x < 68

Answers

Answer: x > 64 and x < 68 is another way of rewriting inequality.

Step-by-step explanation:

To qualify for a role in a play, an actor must be taller than 64 inches but shorter than 68 inches.

⇒The inequality 64 < x < 68, where x represents height,gives the range of height.

⇒In other words range of height can be x > 64 and x < 68 , such that both conditions are applied to single actor.

[with the use of or it will appear to give priority by actor to follow any 1 conditon]

Which prism has a greater volume?

Answers

for A, the volume is 2 x 1 x 7 = 14
for B, the volume is 3 x 3 x 2 = 18

so B has a greater volume

please give brainliest! thanks, :D

Don’t get the steps don’t tell me the answer tho. Just tell me the steps ( I don’t want to cheat)

Answers

D. 4032 cups

Step-by-step explanation:

336 x 12 = 4032

Hope this helps!

Answer:

4,032

Step-by-step explanation:

Just multiply 336 times 12. This is becuase they are not asking for adele's amount.

PLEASE HURRY!!!
A bag contains 4 red pencils, 6 blue pencils, and 5 green pencils. A pencil is randomly selected, its color is recorded, and it is returned to the bag. This is repeated 1350 times. How many times is it expected that a green pencil will be selected?
A. approximately 360 times
B. approximately 450 times
C. approximately 540 times
D. approximately 900 times

Answers

Answer:

450

Step-by-step explanation:

1. Based on the given conditions, formulate:

1350 x 5 ÷ (5 + 4 + 6)

2. Calculate

[tex]\frac{1350x5}{5 + 4 + 6}[/tex]  The numerator is 1350 multiply by 5

[tex]\frac{6750}{5 + 4 + 6}[/tex]

[tex]\frac{6750}{15}[/tex]

Answer: 450

Cassie uses her phone 2 1/4 times as much as Margaret every day. If Margaret averages 1 2/3 hours of phone use per day, how much time does Cassie spend?

Answers

I think it’s 1 and 2/3 times 2 and 1/4 which is 3 and 3/4

Brain teaser what is two plus two minus two plus four divided by two?

Answers

Answer:

4

Step-by-step explanation:

2+2-2+4÷2

we go through

P- parentheses

E- exponents

M- multiplication

D- division

A- addition

S- subtraction

also note that we read it from left to right becaue × is not more important than ÷ and same goes to + and -

First step

2+2-2+(4÷2) --> 2+2-2+2

then

2+2-2+2 --> 4-2+2

then

4-2+2 --> 2+2

finally

2+2=4

Answer:

4

Step-by-step explanation:

Make a stem-and-leaf plot of the data values 14, 22, 9, 13, 30, 8, 25, and 29.
Stem Leaf
89
1 3
22
0
Key: 1 | 3 =
Previous
H
9
2
3
SO

Answers

Answer:

Step-by-step explanation:

BRAINLIEST + STARSS!!

In this diagram, x || y || z and m<9 = 93°.
What is the measure of each angle?
Drag and drop the correct measurements into the boxes to
match each angle.
m<2
m<4
m<7

89° 91 ° 93 ° 87°

Answers

The answer for this is B I took the test

= #7 i
In the diagram, ARST ~ AXYZ . Find the scale factor from
ARST to AXYZ. Write your answer in simplest form.
S
Y
CO
3
R 4
T
21
10.5
Х
14
Z

Answers

Answer:

b

Step-by-step explanation:

Frank needs to pay R60 000,00 towards his son’s university fees in three years’ time. If he has R46 150,30 now, at what interest rate per year compounded monthly, must he invest his money?

Answers

Using compound interest, it is found that he must invest his money at a rate of 8.78% a year.

What is compound interest?

The amount of money earned, in compound interest, after t years, is given by:

[tex]A(t) = P\left(1 + \frac{r}{n}\right)^{nt}[/tex]

In which:

A(t) is the amount of money after t years. P is the principal(the initial sum of money). r is the interest rate(as a decimal value). n is the number of times that interest is compounded per year.

In this problem, the parameters are as follows:

t = 3, A(t) = 60000, P = 46150.3, n = 12.

Hence:

[tex]A(t) = P\left(1 + \frac{r}{n}\right)^{nt}[/tex]

[tex]60000 = 46150.3\left(1 + \frac{r}{12}\right)^{12 \times 3}[/tex]

[tex]\left(1 + \frac{r}{12}\right)^{36} = 1.3[/tex]

[tex]\sqrt[36]{\left(1 + \frac{r}{12}\right)^{36}} = \sqrt[36]{1.3}[/tex]

[tex]1 + \frac{r}{12} = (1.3)^{\frac{1}{36}}[/tex]

[tex]1 + \frac{r}{12} = 1.00731451758[/tex]

[tex]\frac{r}{12} = 0.00731451758[/tex]

r = 12 x 0.00731451758

r = 0.0878.

He must invest his money at a rate of 8.78% a year.

More can be learned about compound interest at https://brainly.com/question/25781328

Pythagorean Theorem

solve for the missing side . Round to the nearest 10th

I NEED HELP ASAP I WILL MARK BRAINLIEST IF ANSWERED CORRECTLY NO LINKS IF YOU DO NOT KNOW THE ANSWER DONT COMMENT ON THIS THREAD

Answers

Answer:

\sqrt{45}

Step-by-step explanation:

A^2+B^2=C^2

36+?=81

81-36=45

[tex]\sqrt{45}[/tex]=

Answer:

6.7 mm

Step-by-step explanation:

Pythagorean Theorem

a² + b² = c²

Here, we are missing one of the altitudes, so we can arrange the equation to form :

a² = c² - b²

Solving

UW² = VW² - UV²UW² = (9)² - (6)²UW² = 81 - 36UW² = 45UW = √45UW = 6.7 mm

Find the perimeter of the figure.
6 meters
2y meters
2y
meters
4y meters
16 meters
4y meters

Answers

Answer:

34

Step-by-step explanation:

Usually when finding the perimeter all you have to do is add the sides.

What is x?

ONLY WRITE A NUMBER FOR YOUR ANSWER

If you need to round, round to the nearest tenth (one decimal place).
Please help, thank you!

Answers

Answer:

15

Step-by-step explanation:

to get from 10 to 25 you time by 2½

so then times 6 by 2½ and the answer is 15

pls help i need an A

Answers

the answer is D. 6x+3

Which point is a point where the graph of [tex]y=(x-5)(x^2-7x+12)[/tex] crosses the x-axis?

Answers

Answer: C. (4, 0)

Step-by-step explanation:

    We can graph the equation given to solve. See attached.

   The answer to this question is C. (4, 0)

Which of the Question A & B?

​

Answers

Answer:

A) 50 households are randomly selected from the town; 14 own a dog

B) 98

Step-by-step explanation:

A) The first choice is the most logical because it doesn’t factor in the accommodations that the other two do.

B) There are 14 households that own dogs per 50 houses, so multiply by 7 to find how many dogs are in the whole town:

50 x 7 = 350 houses

14 x 7 = 98 households

What is the surface area?
5 mm
5 mm
5 mm
square millimeter

Answers

15mm squared. Simply add the sums of all faces on shape.

I need help solving please do not report this question I need the answer I will give 30 points a heart 5.0 stars and brainlest

Answers

Answer:

280 m³

Step-by-step explanation:

Volume of a Triangular Prism

V = 1/2BHL

Solving

V = 1/2 x 7 x 8 x 10V = 7 x 10 x 4V = 280 m³

Answer:

280

Step-by-step explanation:

So first lets establish the formula for a Triangular Prism :

1/2 * b * h * l

now lets use the mesurements given to substitute into the formula :

1/2 * 7 * 8 * 10

now lets solve it by first multiplying all the whole numbers together!

7 * 8 = 56

56 * 10 = 560

Finally lets multiply 560 by 1/2 or in other words, divide 560 by 2 :

560/2 = 280

Anita said, "I'm leaving school today at 1:15."
Frank replied, "I was able to fool the nurse into letting me leave early once, but I got in trouble when she found out I was faking.

What form of punctuation is missing?
A.
quotation marks
B.
There is no missing punctuation.
C.
a semicolon
D.
a colon

Answers

Answer:

A

Step-by-step explanation:

The quotation mark is missing at the very end of the last quote right after:

I was faking.

Answer:

i think A

Step-by-step explanation:

The quotation mark is missing at the very end

Sophie has $40 in an account. The interest rate is 5% compounded annually. To the nearest cent, how much interest will she earn in 3 years? $

Answers

Answer:

$ 6.31

Step-by-step explanation:

The TOTAL amount in the account in 3 years will be

40 ( 1+.05)^3 = 46.31

  subtract the orignal 40 deposit to get the interest =6.31

[tex]~~~~~~ \textit{Compound Interest Earned Amount} \\\\ A=P\left(1+\frac{r}{n}\right)^{nt} \quad \begin{cases} A=\textit{accumulated amount}\\ P=\textit{original amount deposited}\dotfill &\$40\\ r=rate\to 5\%\to \frac{5}{100}\dotfill &0.05\\ n= \begin{array}{llll} \textit{times it compounds per year}\\ \textit{annually, thus once} \end{array}\dotfill &1\\ t=years\dotfill &3 \end{cases}[/tex]

[tex]A=40\left(1+\frac{0.05}{1}\right)^{1\cdot 3}\implies A\approx 46.31~\hfill \underset{earned~interest}{\stackrel{46.31~~ - ~~46}{\approx 6.31}}[/tex]

Other Questions
Dans/des/il/tables/a/,/bibliothque/la/y/. Write three to four sentences in which you compare and contrast Seamus Heaneys poem "Digging" and the haiku by Bash.In terms of structure, the poems are very different. The haiku is only three lines long and discusses a single moment in time; Digging is much longer, has many stanzas, and jumps between time periods. There are some ways in which the poems are similar, however. For example, the speakers of both poems discuss how their writing is related to and inspired by farming or gardening. Please help!! Will give brainliest! :) 4) True or False? Our town is growing with a doubling time of 40 years, so itspopulation will triple in 120 years. The set of ordered pairs below represents a linear function((-2,-3), (0,-2), (2, -1), (x, y)}What is another pair of coordinates that could be the missing ordered pair, (x,y),in this set? One of Japans top products is cars because Japanese automakers manufacture cars quickly and efficiently. However, the fuel needed to power those cars is not found in great amounts in Japan. Which of these is Japan more likely to bring in from another country: cars or fuel? When a shareholder contributes appreciated property to an S corporation in a transfer that qualifies under Section 351 and the shareholder receives stock and cash in return, the shareholder will recognize: What distinguishes asteroids from other solar system objects is that they always have irregular, "potato-like" shapes. True False 1. What is the surface area of the sphere below?12 cm URGENT PLEASE IM BEING TIMED!!!What are the solutions to the system of equations graphed below?(-5, -4) and (2, 0) (0, 4) and (2, 0)(-5, -4) and (0, -1) (0, 4) and (0, -1) MARK YOU THE BRAINLIEST!Which statement is true of meiosis ?A. Organisms use meiosis to growB. Organisms use meiosis to replace blood cellsC. Organisms use meiosis to repair damaged cellsD. Organisms use meiosis to make reproductive cells If the length of a rectangle is 4 more than the width and if the perimeter of the rectangle is 52, what is the width of the rectangle? O 11 O 12 O 15 0 24 The __________________ was one of the first great skyscrapers. a. edgar kaufmann building b. frederick c. robie building c. fallingwater building d. woolworth building 10.) It costs $5 to enter the arcade and $0.75 for every game you play once inside.You have$20 to spend. How many games can you play?Writean equation using g to stand for the games. Solve your equation for g. When did Elena fall in love with Damon?A) She always loved himB) When they danced at the Miss Mystic Falls pageantC) When he gave her her necklace backDON'T DELETE THIS IS FOR MY THEATER CLASS Based on her past experiences, a homeowner estimates that appliances lose 25% of their resale value each year. If her estimate is accurate, how much will an appliance currently valued at $1,500 be worth in 8 years? How many times did a batter come to the plate during the time period? find all the fraction between 0 and 1 when was the Articles of Confederation ratified? You push a box 10.0m with a force of 45 N. How much work do you do?