Question

**Please show all work**

A researcher was interested in examining a relationship between hours of exercise and concentration level among BYC students. Also, he was interested in examining whether hours of exercise would predict the concentration level. Answer following questions based on the given data.

Exercise
(X)
Concentration level (Y)

0
4

2
1

8
10

6
9

4
6

x̅=4
Y=6

SSx =
40
SSy=54

Q1: What is the regression line? Y hat = __________

Q2: Compute SS residual.

Q3: Find the standard error of the estimate.

Answer #1

1)

please like ??

Please show all work and state null and research
hypotheses in complete sentences
Correlation Hypothesis Testing
Person X (exercise- hr per
week) Y (stress
level)
1
5
4
2
7
2
3
6
0
4
3
7
5
6
5
6
4 ...

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 is interested to learn if there is a linear
relationship between the hours in a week spent exercising and a
person’s life satisfaction. The researchers collected the following
data from a random sample, which included the number of hours spent
exercising in a week and a ranking of life satisfaction from 1 to
10 ( 1 being the lowest and 10 the highest).
Participant
Hours of Exercise
Life Satisfaction
1
3
1
2
14
2
3
14
4...

Dr. Smith was interested in examining if weekly exercise would
produce a change in the stress levels among individuals in the
population. In general population of college students, scores on a
standardized stress test that are normally distributed with the
mean µ = 20 and standard deviation σ = 5. Because it was not
feasible to ask everyone in the population to exercise weekly, a
sample of n = 16 individuals was selected, and the exercise
training program was given...

A researcher was interested in the relationship between
an average daily time spent on social media (i.e., X variable) and
social anxiety (i.e., Y variable).
The data collected on a sample of n =
82 undergraduate students produced the following
results: SSx=
49, SSY= 36, SP = 11,
MX = 8, MY =
15.
A. Is there a significant correlation between an average daily
time spent on social media and social anxiety? Use 2-tailed test,
p < .05 to answer this research...

A researcher measures the relationship between sleep medication
use (times used per week) and time spent working (in hours per
week). Are they significantly correlated? Conduct a hypothesis test
at the .05 significance level.
Sleep Medication Use
Time Spent Working
Deviation Scores
Sum of Squares
X
Y
X-Mx
Y-MY
(X-Mx)
(Y-MY)
(X-Mx)2
(Y-MY)2
8
18
3
40
6
20
2
32
Mx=
MY =
SSXY=
SSX=
SSY=
Hypotheses:
Critical Value:
r =
Decision:

Research into the relationship between hours of study and grades
show widely different conclusions. A recent survey of graduates who
wrote the Graduate Management Admissions Test (GMAT) had the
following results.
Hours Studied Average Score
(Midpoint)
64 350
72 450
79 550
106 650
99 750
The Excel output for this regression is as following
SUMMART OUTPUT
____________________________
Regression Statistics
____________________________
Multiple R 0.919958
R Square 0.846322
Adjusted R Square 0.795097
Standard Error 71.57225
Observations 5
Anova
___________________________________________________________________________________________
...

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
7
7
4
6
7
5
11
6
3
8
4
2
5
4
1
10
11
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...

A researcher measures the relationship between Internet use
(hours per week ) and social interaction(hours per week) i a sample
of 10 students. The following table lists the hypothetical results
of this stufy
Internet use social interaction
x y
6 4
9 7
4 6
6 5
13 6
4 8
4 3
7 6
1 11
11 2
(a)compute the pearson correlation coefficient (round to three
decimal places)
(b) Compute the coefficient of determination (round your answers
to...

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