Question

A researcher examined the relationship between sleep hours and stress levels among NYC students. He studied 10 participants. He found that r-statistics is r = .620. What is his conclusion? Use alpha level = .05 Two-tailed test.

*Failed to reject the null hypothesis and conclude that there is no relationship between the two variables.

*Reject the null hypothesis and conclude that there is no relationship between the two variables.

*Reject the null hypothesis and conclude that there is a relationship between the two variables.

*Failed to reject the null hypothesis and conclude that there is a relationship between the two variables.

A researcher examined the relationship between SNS use and GPAs among BXYF students. She studied 20 students. What is the cut off points for r-statistics? Use the two-tailed test and alpha = .05.

0.423

0.378

0.444

0.433

Suppose the correlation between height and weight for adults is +0.40. what is the coefficient determination of the variability in weight can be explained by the relationship with height

16%

60%

40%

84%

Answer #1

1.

r = 0.620

Alpha = 0.05

Df = 10-1 = 9

Critical value = 0.602

*Reject the null hypothesis and conclude that there is a relationship between the two variables.

2.

Alpha = 0.05

Df = 20-1 = 19

The cut off point or r Statistics is 0.423

Therefore, 1st Option is correct.

3.

r = 0.40

Coefficient of determination = 0.40^2 = 0.16 or 16%

Therefore, 1st Option ia correct.

16%

Dear student,

I am waiting for your feedback. I have given my 100% to solve your
queries. If you satisfied with my answer then please please like
this.

Thank You

A researcher is interested in the association between hours
studying and hours spent at the gym. She surveys 20 students and
obtains a correlation coefficient of -0.80. Using an alpha level of
0.05 for a two-tailed test, what decision should the researcher
make about the null hypothesis?
Reject the null hypothesis
Fail to reject the null hypothesis
Reject the alternative hypothesis
Accept the null hypothesis

For a sample of 116 college students, the relationship between
the reported hours of sleep during the previous 24 hours and the
reported hours of study during the same period was studied. Data
for y = hours of sleep the previous day and x =
hours of studying the previous day for n = 116 college
students were computed. Some regression results for those data are
shown in the following table.
Regression output
Predictor
Coef
SE Coef
T
P
Constant...

For your answers pick one
*A researcher was interested in inspecting the effect of
classical music on stress among New York students. She studied a
sample of 30 New York students. She found that z= -3.00. Using a =
0.5(two-tailed), what can she conclude?
-Reject the null hypothesis and conclude that classical music
has no effect on stress levels
-Reject the null hypothesis and conclude that classical music has
no effect on stress levels
-Failed to reject the null hypothesis...

A researcher investigates the relationship between minority
stress and depression. He collects data from 15 individuals and
finds a correlate coefficient of r = .55. Please determine the
direction & strength of the relationship and statistical
significance at an alpha level of .05.
a. There is a statistically significant large, negative
relationship between minority stress and depression, r = .55, p
< .05
b. There is a statistically significant large, positive
relationship between minority stress and depression, r = .55,...

36. A researcher wants to examine if there is a correlation
between number of work hours per week and academic performance in a
sample of n = 150 undergraduate students. What will be the null
hypothesis, if she plans to use a two-tailed Person’s
correlation test in data analysis?
A. There is a significant correlation between number of work
hours per week and academic performance in the population of
undergraduate students.
B. There is a significant positive correlation between number...

A researcher is interested in the relationship between one’s
satisfaction with pay (X) and one’s commitment to the organization
(Y). The researcher collects data from 24 employees and finds that
the correlation between the two variables is r = 0.22.
a. State the null hypothesis.
b. Identify the appropriate statistical test
c. Calculate the appropriate test statistic. Make sure to report
the degrees of freedom for the statistical test (if appropriate).
You must show your work to receive full credit....

A researcher was interested in the relationship between the
reported stress level (variable X) and performance on memory test
(variable Y).
The data collected on a sample of n =
62 undergraduate students produced the following
results: MX = 4, SSx = 30,
MY = 6, SSY= 90, and
SP = - 15
A. Is there a significant correlation between
stress level and memory performance? Assume 2-tailed test,
p < .05. For full credit your answer should
include:
Null and alternative...

A researcher measures the relationship between Internet use
(hours per week) and social interaction (hours per week) in a
sample of 10 students. The following table lists the hypothetical
results of this study.
Internet
Use
Social
Interaction
X
Y
7
3
9
6
5
6
8
7
12
4
3
8
2
3
7
6
1
9
12
2
(a) Compute the Pearson correlation coefficient. (Round your
answer to three decimal places.)
(b) Compute the coefficient of determination. (Round your...

A researcher measures the relationship between Internet use
(hours per week) and social interaction (hours per week) in a
sample of 10 students. The following table lists the hypothetical
results of this study.
Internet
Use
Social
Interaction
X
Y
7
4
8
6
6
6
6
7
13
5
3
7
4
3
7
5
1
10
12
4
(a) Compute the Pearson correlation coefficient. (Round your
answer to three decimal places.)
(b) Compute the coefficient of determination. (Round your...

A researcher measures the relationship between Internet use
(hours per week) and social interaction (hours per week) in a
sample of 10 students. The following table lists the hypothetical
results of this study.
Internet
Use
Social
Interaction
X
Y
6
5
7
6
4
7
6
5
11
5
4
6
4
2
6
5
3
9
11
4
(a) Compute the Pearson correlation coefficient. (Round your
answer to three decimal places.)
(b) Compute the coefficient of determination. (Round your...

ADVERTISEMENT

Get Answers For Free

Most questions answered within 1 hours.

ADVERTISEMENT

asked 7 minutes ago

asked 19 minutes ago

asked 26 minutes ago

asked 29 minutes ago

asked 47 minutes ago

asked 49 minutes ago

asked 52 minutes ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 3 hours ago

asked 3 hours ago