Question

What Statistical Test Should I Use

Please indicate the type of test needed to analyze the data described.

Hints: Think about the IV and DV.   How many levels of the IV?  Are they repeated measures? Are the data categorical?

A. z-test

B. One-Sample t-Test

C. Dependent Measures t-Test

D. Independent Measures t-Test

E. One-way ANOVA

E. One-way ANOVA

F. Post-hoc tests

G. Between-Subjects Factorial ANOVA

H. Chi-Square test of Independence

________ 1. Compare spatial task scores after 0 or 3 drinks.

_________ 2. Conduct research to determine soda preferences of either Coke or Pepsi for adults (age 18 or over) and youth (age 13 to 17).

_________ 3. A researcher is interested in whether people who smoke cigarettes (Yes or No) are more likely to have lung cancer (Yes or No) than chance.

_________ 4. You are a researcher interested in conducting a study to evaluate the effectiveness of students’ note-taking habits on a resulting test score. You conduct a study where participants are randomly assigned to three distinct groups: 1) they are given an outline of the lecture and are allowed to take notes (n = 22); 2) they are not provided with an outline but they are allowed to take notes (n = 22); and, 3) they are not provided with an outline and they are not allowed to take notes (n = 22). After attending a lecture, each participant takes a test. Results reveal there is a significant effect of test scores. What test would you use to determine which specific groups(s) differ from each other?

_________ 5. A researcher is interested in finding out if the color of the classroom affects performance on a memory test. He randomly assigns 10 students to a classroom with green walls, 10 students to a classroom with purple walls, and 10 students to a classroom that has neutral colored walls (typical classroom). After the students are all assigned to their rooms they are given the memory test and scores are determined.

                                                                                                                                                                            

_________ 6. A new drug is being tested to determine its effectiveness for decreasing depression. A group of participants are measured on depression levels before and after receiving the drug. Scores before and after were compared.

_________ 7. Dr. Williamson wants to determine if the GPA of students in her experimental psychology class is significantly higher than the average GPA of all college students attending KSU in the same semester. The mean of all college students enrolled at KSU in the fall semester of 2008 is 2.9 and the SD is .3.

_________ 8. Faculty teaching Experimental Psychology want to know if the statistics ability of KSU graduates differ from the national average. They know that the average on the national statistics exam is 5.8

PLEASE ANSWER THEM ALL, CORRECTLY, FOR A THUMBS UP!!

Answer 1

1)

Dependent Measures t-Test

Reason : Same sample with before and after

2)

Chisquare Independent test

Reason : Checking their preference (association)

3)

Chisquare Independent test

Reason : Checking whether there is any association between smoking and lung cancer

4)

Post hoc tests

Reason : To test which specific groups are different or not

5)

Chisquare Independent test

Reason : Association between color of the class room and memory test

6)

Dependent Measures t-Test

Reason : Scores before and after were compared.

7)

Z test

Reason : population standard deviation is known

8)

One sample t test

Reason : population standard deviation unknown