Question

A school psychologist believes that a popular new hypnosis
technique increases depression. The psychologist collects a sample
of 23 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 49.21. Normal individuals in the
population have a depression inventory average of 49 with a
variance of 121.00. What can the psychologist conclude with an α of
0.01?

**a)** What is the appropriate test statistic?

z-test

Independent-Samples t-test

Related-Samples t-test

If appropriate, compute the CI. If not appropriate, input "na"
for both spaces below.

[ , ]

**e)** Compute the corresponding effect size(s) and
indicate magnitude(s).

If not appropriate, input and select "na" below.

*d* = ; ---Select--- na trivial effect
small effect medium effect large effect

*r*^{2} = ; ---Select--- na
trivial effect small effect medium effect large effect

Answer #1

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) What is the appropriate statistic?
---Select--- na Correlation Slope Chi-Square
Compute the statistic selected in a):
b) Obtain/compute the appropriate values to...

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 null...

Generally, the average typing speed is 56 words per minute (wp).
A professor wanted to see where his students stand compared to the
population. He tested 24 of his students and obtained the following
estimates: an average typing speed of 58 with a variance of 361.00.
What can the professor conclude with α = 0.01?
a) What is the appropriate test statistic?
---Select--- na z-test One-Sample t-test Independent-Samples t-test
Related-Samples t-test
Also state population and sample from choices below
Population:...

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?
a) What is the appropriate test statistic?
na z-test one-sample t-test independent-samples t-test
related-samples t-test
b)
Population:
current sample the...

A developmental psychologist hypothesizes that drinking soda
effects the hyperactivity of children. Children in the experimental
condition were given a can of soda during their afternoon break.
Children in the control condition were not given any soda. The
hyperactivity of the children was measured after the break. Below
are partial SPSS results:
a) Compute the appropriate test statistic(s) to
make a decision about H0.
(Hint: Make sure to write down the null and alternative hypotheses
to help solve the problem.)...

Dr. Yan predicts that a novel antidepressant drug improves
cognition. To examine this, the drug is administered to a random
sample of 28 trained rats. The rats were then placed in a maze and
timed on how long it took them to complete it. The average
completion time was 48 seconds. Normal rats have an average
completion time of 44 seconds with a variance of 100.00 seconds.
What can be concluded with an α of 0.10? )
What is the...

Application Exercise:
In a fast food company, all male employees with 3 to 5 years of
experience have an average salary of $27900 with a with a standard
deviation of $5090. A random sample of 27 female employees also
having 3 to 5 years of experience had an average salary of $27200.
The company accountant suspects a different in salary practices for
males and females. What can be concluded with an α of
0.10?
a) What is the appropriate test...

A national organization ran an advertising campaign designed to
convince people to quit smoking. To evaluate their campaign, they
had subjects record the average number of cigarettes smoked per day
in the week before and one week after exposure to the ad. What can
be concluded with α = 0.05. The data are below.
before
after
35
17
12
29
18
19
27
26
16
41
46
17
21
34
31
20
34
26
27
41
a) What is the...

Vita Pills were advertised as having 751 mg of vitamin B3 per
pill. A marketing firm hypothesizes that the amount of vitamin B3
is less than what is advertised. What can be concluded with α =
0.10. The vitamin B3 content per pill from a sample of pills is as
follows:
713, 761, 716, 721, 751, 721, 711, 741.
a) What is the appropriate test statistic?
---Select--- na z-test One-Sample t-test Independent-Samples t-test
Related-Samples t-test
b)
Population:
---Select--- sample of...

Children of a certain age in the nation have an average weight
of 86 with a variance of 92.16 lb. A complaint is made that
children are overfed fed in a municipal children's home. As
evidence, a sample of 24 children of the given age is taken from
the children's home with an average weight of 89.65 lb. What can be
concluded with an α of 0.05?
a) What is the appropriate test statistic?
---Select one--- (na, z-test, one-sample t-test,...

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