Psychology Statistic Questions:

1.Suppose you conduct an experiment with 24 subjects and yourturns out to be 2.92, which is statistically significant at the alpha level of .05. What is the correct way to report your results?

2.Identify the IV and the DV in each research question or the x variable and the yvariable.

A memory researcher is interested in how atypical actions in an event (e.g., the cash register falling on the floor while you're in line at the grocery store) are remembered over time. 50 people participate in a grocery store event and are asked to recall everything that happened immediately afterwards, 1 month later and 6 months later. She records the number of atypical actions recalled each time. Does the recall of atypical information decline over time?

3.is it a one tailed or 2 tailed tests (where applicable)?

Dr Nomack believes that Obsessive compulsive disorder can best be treated by using a combination of SSRI's and cognitive therapy.He currently has 1,000 clients diagnosed with this disorder who are being seen in his practices.He has randomly assigned each client into one of the following treatments groups:No therapy; SSRI alone' CBT alone; SSRI and CBT in combination. After a 12-week interim, he then assesses all 1,000 clients on the Big T Obsession and Compulsion rating scale.He expects that those clients who are receiving both SSRI's and CBT will show the fewest symptoms after the treatment phase.

4.For the following, please identify what type of statistical test you would use and explain your choice!

One sample Z test

One sample t-test

correlation coefficient

t-test for independent samples

t-test for related samples (matched pairs observations)

t- test for related samples (test-retest)

One-factor ANOVA:identify within or between design

A medical researcher wants to know if pet ownership increases the probability of living one year after a heart attack. A total of 200 coronary patients were asked if they owned a pet and were followed up one year after a heart attack to see if they were still alive.

5.For the following, please identify what type of statistical test you would use and explain your choice. Identify the two-way ANOVA.

One sample Z test

One sample t-test

correlation coefficient

t-test for independent observations

t-test for related samples (matched pairs observations)

t- test for related samples (test-retest)

One-factor ANOVA:identify within or between design

Dr. Sims is interested in whether or not her Supplemental instructor is helping students with their work in her research methods class.She accrues the students grades from this semester and compares them to the past 4 years of grades.Unfortunately, she does not know the standard deviation for the past four years of grades.

6.Is it a one tailed or 2 tailed tests (where applicable)?

Does the type of movie children are watching make a difference in the number of snacks they will eat?A group of 50 children were randomly assigned to watch either a cartoon or a live action musical (25 to each).Crackers were available in a bowl, and the investigators compared the number of crackers eaten by children while watching the different kinds of movies.

7.Is it a one tailed or 2 tailed tests (where applicable)?

A memory researcher is interested in how atypical actions in an event (e.g., the cash register falling on the floor while you're in line at the grocery store) are remembered over time. 50 people participate in a grocery store event and are asked to recall everything that happened immediately afterwards, 1 month later and 6 months later. She records the number of atypical actions recalled each time. Does the recall of atypical information decline over time?

8.For the following, please identify what type of statistical test you would use and explain your choice. Identify the two-way Anova

One sample Z test

One sample t-test

correlation coefficient

t-test for independent observations

t-test for related samples (matched pairs observations)

t- test for related samples (test-retest)

One-factor ANOVA:identify within or between design

A study was conducted to examine the impact of speaking in public on college students.A class of 15 statistics students participated in the study.At the beginning of a lecture the students recorded their systolic blood pressure.During the lecture the instructor called on each student to stand and answer questions about topics in the lecture.After speaking the students once again recorded their blood pressure.

9.Is it a one tailed or 2 tailed tests (where applicable)?

A random sample of 3rd grade children were placed in a special program to improve their reading ability. After a 10-week intensive program, do they read significantly better than average 3rd grade children, that is, as compared to the national norms? Let's assume that we know both the national norm AND its standard deviation.

10. Identify the IV and the DV in each research question.

A sample of stores was selected and divided randomly into three groups. Group I initiated the policy of giving trading stamps, Group II initiated the lottery-type card punching policy, and Group III initiated neither. The stores were also classified as being located in a community of low, medium, or high economic level. After a period of two months, Monetary sales for each of the stores was examined.Is there a significant difference between the groups in terms of sales over the period?