Question
In: Statistics and Probability
A social psychologist hypothesizes that more Facebook use is related to less depression. The psychologist collects...
A social psychologist hypothesizes that more Facebook use is
related to less depression. The psychologist collects hours on
Facebook and depression score data from a sample of clinically
depressed patients. What can be concluded with an α of
0.01?
| depression | |
| 3 4 5 4 3 4 2 3 |
0 7 9 6 1 4 2 5 |
a) Compute the correlation statistic.
b) Obtain/compute the appropriate values to make a
decision about H0.
(Hint: Make sure to write down the null and alternative hypotheses
to help solve the problem.)
critical value = _____________ ; test statistic =
_____________
Decision: ---Select--- Reject H0 Fail to reject H0
c) Compute the corresponding effect size(s) and
indicate magnitude(s).
If not appropriate, input and/or select "na" below.
effect size = _____________ ; ---Select--- na trivial
effect small effect medium effect large effect
d) Make an interpretation based on the
results.
1)There is a significant positive relationship between depression and using Facebook.
2)There is a significant negative relationship between depression and using Facebook.
3) There is no significant relationship between depression and using Facebook.
Solutions
orchestra answered 1 year agoRelated Solutions
A social psychologist hypothesizes that more Facebook use is related to less depression. The psychologist collects...
A social psychologist hypothesizes that more Facebook use is
related to less depression. The psychologist collects hours on
Facebook and depression score data from a sample of clinically
depressed patients. What can be concluded with an α of
0.01?
Facebook
depression
3
4
5
4
3
4
2
3
0
7
9
6
1
4
2
5
a): Compute the correlation statistic
b) Obtain/compute the appropriate values to make a
decision about H0.
(Hint: Make sure to write down the...
A psychologist hypothesizes that depression decreases with aging. It is known that the general population scores...
A psychologist hypothesizes that depression decreases with
aging. It is known that the general population scores a 41 on a
standardized depression test where a higher score indicates more
depression. The psychologist obtains a sample of individuals that
are all over 65 years old. What can the psychologist conclude with
an α of 0.05? The data are below.
id
depression
score
2
6
8
12
3
4
11
19
5
6
76.1
44.9
64.8
42.2
30.1
67.6
51.3
36.5
54.3...
A school psychologist believes that a popular new hypnosis technique reduces depression. The psychologist collects a...
A school psychologist believes that a popular new hypnosis
technique reduces depression. The psychologist collects a sample of
20 students and gives them the hypnosis once a week for two months.
Afterwards the students fill out a depression inventory in which
their mean score was 54.5. Normal individuals in the population
have a depression inventory mean of 50 with a standard deviation of
3.5. What can be concluded with an α of 0.01?
a) What is the appropriate test statistic?...
A school psychologist believes that a popular new hypnosis technique increases depression. The psychologist collects a...
A school psychologist believes that a popular new hypnosis
technique increases depression. The psychologist collects a sample
of 25 students and gives them the hypnosis once a week for two
months. Afterwards the students fill out a depression inventory in
which their average score was 53.88. Normal individuals in the
population have a depression inventory average of 50 with a
variance of 100.00. What can the psychologist conclude with α =
0.01?
a) What is the appropriate test statistic?
---Select---...
A counselor hypothesizes that a popular new cognitive therapy increases depression. The counselor collects a sample...
A counselor hypothesizes that a popular new cognitive therapy
increases depression. The counselor collects a sample of 28
students and gives them the cognitive therapy once a week for two
months. Afterwards the students fill out a depression inventory in
which their mean score was 50.73. Normal individuals in the
population have a depression inventory mean of 50 with a variance
of 12.96. What can be concluded with α = 0.01?
- c) Obtain/compute the appropriate values to
make a...
A health psychologist hypothesizes that depression levels in the nation have been decreasing over the years....
A health psychologist hypothesizes that depression levels in the
nation have been decreasing over the years. In the late 2000s, the
average score on the Birk Depression Inventory (BDI) in the nation
was 17 with a variance of 56.25. A current sample of 16 generates
an average BDI score of 13.4. What can be concluded with an α of
0.10?
c) Obtain/compute the appropriate values to
make a decision about H0.
(Hint: Make sure to write down the null and...
Research Scenario: A social psychologist is studying the differences in the number of Facebook® friends between...
Research Scenario: A social psychologist is
studying the differences in the number of Facebook® friends between
identical twins raised apart. She believes that twins raised in
different environments will have differences in the number of
friends, which would help point to the influence of environmental
factors over inherited factors on social outcomes. She divides the
twins into two groups (“Twin 1” and “Twin 2”), collects the data
and creates the table below.
Using this table, enter the data into a...
A social psychologist is interested in how optimism is related to life satisfaction. A sample of...
A social psychologist is interested in how optimism is related
to life satisfaction. A sample of individuals categorized as
optimistic were asked about past, present, and projected future
satisfaction with their lives. Higher scores on the life
satisfaction measure indicate more satisfaction. Below are the
data. What can the psychologist conclude with α = 0.05?
past
present
future
22
24
27
26
28
27
28
29
30
30
24
27
30
28
29
a) What is the appropriate test statistic?...
A social psychologist is interested in how optimism is related to life satisfaction. A sample of...
A social psychologist is interested in how optimism is related
to life satisfaction. A sample of individuals categorized as
optimistic were asked about past, present, and projected future
satisfaction with their lives. Higher scores on the life
satisfaction measure indicate more satisfaction. Below are the
data. What can the psychologist conclude with α = 0.05?
past
present
future
22
24
27
26
28
27
28
29
30
30
21
27
26
28
29
a) What is the appropriate test statistic?...
A social psychologist is interested in how optimism is related to life satisfaction. A sample of...
A social psychologist is interested in how optimism is related
to life satisfaction. A sample of individuals categorized as
optimistic were asked about past, present, and projected future
satisfaction with their lives. Higher scores on the life
satisfaction measure indicate more satisfaction. Below are the
data. What can the psychologist conclude with α = 0.05?
past
present
future
22
24
27
26
28
27
28
29
30
30
24
27
30
28
29
Compute the corresponding effect size(s) and indicate...
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