Question

**Questions 14-18 are based on Scenario 4**. A
researcher is interested in studying how exposure to blue spectrum
light (the light emitted from smartphones and other technology
devices) can influence sleep quality. She randomly assigns one
group of participants to use no technology before bed for 1 week,
and a second group of participants to look at a smartphone or
tablet for 1 hour before bed for 1 week, and a third group to read
a book for 1 hour before bed for 1 week. She compares the groups on
their sleep quality and expects that the group that uses technology
before bed will sleep significantly worse than the other two
groups.

Question 14

What is the null hypothesis for scenario 4?

Group of answer choices

H0: µ1 = µ2 =µ3

H0: r = 0

H0: X = µ

H0: µposttest = µpretest

Question 15

What is the alternative hypothesis for scenario 4?

Group of answer choices

H_{1}: µ1 ≠ µ2 ≠µ3

H_{1}: R_{xy} > 0

H_{1}: X ≠ µ

H_{1}: µposttest ≠µpretest

Question 16

What is the most appropriate test statistic to use to test the hypothesis in scenario 4?

Group of answer choices

factorial ANOVA

dependent samples t test

independent samples t-test

one way ANOVA

regression

z-score

correlation coefficient

z-test

Question 17

What is the independent variable for scenario 4?

Group of answer choices

Amount of exposure to light (technology) before bed

The amount of time they engage in the bedtime routine (1 hour)

Sleep quality

The length of the study (1 week)

There is no independent variable (because the study is correlational)

Question 18

What is the dependent variable for scenario 4?

Group of answer choices

Amount of exposure to technology before bed

The length of the study (1 week)

There is no dependent variable (because the study is correlational

Sleep quality

The amount of time they engage in the bedtime routine (1 hour)

**Questions 19-23 are based on Scenario 5.** A
researcher is interested in studying whether a company’s sick day
policies can influence how much employees feel motivated to work
hard. They randomly assign company A to adopt a sick day policy in
which employees are given at total of 15 sick days that they may
use at any point during the year without question or documentation
required, and Company B to adopt a policy in which they are given
up to 15 sick days, but they must provide a doctor’s documentation
of their illness in order to be able to take the day off. The
researcher believes that employees at company A, with the more
lenient “no questions asked” policy will feel more motivated to
work hard than those at company B, with the stricter sick day
policy.

Question 19

What is the alternative hypothesis for scenario 5?

Group of answer choices

H_{1}: m _{CompanyA} ≠ m _{CompanyB}

H_{1}: µ1 = µ2 =µ3

H_{1}: r_{xy} ≠ 0

H_{1}: m _{companyA} > m
_{CompanyB}

H_{1}: m _{CompanyA} < m
_{CompanyB}

Question 20

What is the independent variable for scenario 5?

Group of answer choices

Employee motivation to work hard

The type of company they work for

The participants

The number of days employees get off each year

There is no independent variable (because it is a correlational study)

Type of sick day policy

Question 21

What is the dependent variable for scenario 5?

Group of answer choices

The type of company they work for

Type of sick day policy

The number of days employees get off each year

Employee motivation to work hard

There is no dependent variable (because it is a correlational study)

Question 22

What is the most appropriate test statistic to use to test the hypothesis in scenario 5?

Group of answer choices

independent samples t-test

z-score

one-way ANOVA

correlation coefficient

dependent samples t-test

z-test

regression

23. Imagine that you actually did the study in scenario 5.
*Write up the results as you would see it in an APA results
section of an empirical article (you can make up the values for
your statistical test, means, and standard deviations
here).*

Answer #1

14] H0: µ1 = µ2 =µ3

15] H1: µ1 ≠ µ2 ≠µ3

16] One way anova test is best because we have three independent groups

17]Independent varibale is The amount of time they engage in the bedtime routine (1 hour).

18] Dependent variable is Sleep quality.

19] Alternative Hypothesis is H1: m companyA > m CompanyB

20] Independent variable is Type of sick day policy

21] Dependent variable is Employee motivation to work hard.

22] independent samples t-test because both groups are independent to each other .

The following 4 questions refer to Scenario 4.
Generally speaking, people are pretty bad at telling whether or not
someone is lying. Researchers are interested in studying if age is
associated with ability to tell if someone is lying. Researchers
compare a group of children (ages 8-10), adolescents (ages 14-17),
and adults (ages 25-45) on their ability to tell if a person in a
recorded video is lying or telling the truth.
A. What is the null hypothesis for scenario...

Questions 7 to 13 are based on the following problem A
researcher used a sample of n =16 adults between the ages of 40 and
45. For each person, the researcher recorded the difference between
the ratings obtained while smiling and the rating obtained while
frowning. On average the cartoons were rated as funnier when the
participants were smiling, with an average difference of MD = 1.6,
with SS = 135. Are the cartoons rated as significantly funnier when
the...

You are a psychologist who is interested in studying the effects
of media coverage of thin models on the development of eating
disorders. Specifically, you want to determine if viewing media
coverage of really thin models is related to the likelihood of
being diagnosed with an eating disorder.
1. state your hypothesis
2. Would you use an experiment or correlational design to test
your hypothesis? Why?
3.If you conducted an experiment, the independent variable would
be
4.If you conducted an...

Read the scenario and answer the question that follows:
An experiment was set up to study two drugs, Lipanthyl and
Befizal, based on their effect on cholesterol level in blood. A
group of 25 men with high cholesterol level were randomly assigned
one of the two drugs. The level of LDL was measured right before
the treatment and again after the 3-month treatment.
Suppose we wanted to compare the LDL levels of the subjects on
Lipanthyl versus those on Befizal....

Read the scenario and answer the question that follows: An
experiment was set up to study two drugs, Lipanthyl and Befizal,
based on their effect on cholesterol level in blood. A group of 25
men with high cholesterol level were randomly assigned one of the
two drugs. The level of LDL was measured right before the treatment
and again after the 3-month treatment. Suppose we wanted to compare
the LDL levels pre and post treatment with Lipanthyl. 1. Would you...

Research Scenario 4
An organization has recently restructured and, in the process,
has created a new department. Since the transition, members of the
new department have had difficulty working with one another and
departmental performance is low. An I/O consultant has been hired
to implement an intervention to decrease interpersonal conflict
among employees. To help diagnose the issue, he emails a survey to
the 36 department members asking them to rate conflict levels on a
scale from 1 (no conflict)...

(Case evaluation, Questions 26-39)
In a study, the researchers were interested in seeing whether if
Ariana Grande’s music can be sexually stimulating to men. The
researchers decided to include male students from Hunter College,
age ranging from 18-20, without pre-diagnosed sexual dysfunctions.
Out of the possible N=10,538 students who meet the criteria for
participation, 200 men were randomly selected by computer to
participate. After having the participants sign the informed
consent, the researchers randomly assigned these subjects into 4...

****PLEASE ANSWER ALL QUESTIONS****
Question 12 (1 point)
A medical researcher wants to determine if the average hospital
stay of patients that undergo a certain procedure is greater than
8.7 days. The hypotheses for this scenario are as follows: Null
Hypothesis: μ ≤ 8.7, Alternative Hypothesis: μ > 8.7. If the
researcher takes a random sample of patients and calculates a
p-value of 0.0942 based on the data, what is the appropriate
conclusion? Conclude at the 5% level of significance....

1. If you want to study the effect of hormonal changes in
adolescent boys, your population would be
Group of answer choices
All adolescents
All the people in the world
All males
All adolescent males
2. Which of the following is most likely to be measured
categorically?
Group of answer choices
Weight gain in first year college students
Deterioration in driving performance under the influence of
alcohol
Level of authoritarianism in a sample of public accountants
Species of dog appearing...

An occupational psychologist wishes to assess two different
methods of manager supervision in influencing employee
productivity. One method involves constant supervision by the
workplace manager, while the second method involves intermittent
(every 15 minutes) supervision by the workplace supervisor.
To test whether constant versus intermittent supervision may
influence workplace productivity differently, the psychologist
first randomly selects 8 employees at his/her organization. Over
the course of two weeks, each of the n = 8 employees is
exposed to each of the...

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