Question 1

Please identify whether the following study represents an independent samples or paired samples design. If it is paired samples, then please specify which type of paired samples design; and degree of freedom

A. Research suggests a relationship between TV viewing and habits of 5 year old children and their future performance in high school. The researcher first surveys the parents of (n=15) 5 year olds to obtain the information on the family TV viewing habits during the time that the students were 5 years old. Then their average high school grades was obtained to compare.

B. Researchers wanted to see if 6 year old girls and boys had different verbal skills while socializing with their peers. Thirteen 6 year old boys were selected and were paired with the girls with the same age, SES, GPA, and height.

C. At csn, 20 students were randomly selected in a psychology class and 20 from a history class to see if their overall class grade was any different.

D. 23 and me is company that provides a genetic analysis on customers who wish to learn more about their ancestry. It allows the company to conduct studies to compare whether the current generation resembles their ancestors in several demographic variables. Thirty females in their 20's were compared with their grandmothers on 15 part physical traits.

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Question 2

The IQs of a group of special education students were compared to the IQs of their siblings who were not in special education. The following IQ were obtained. Perform a t test, find d, and interpret the results in sentences format. Don't forget to add all the stat symbols as shown in the chapter, beginning with Reject or fail to reject and end with p value. Please show all your work and circle or underline your t, d, t critcal, df, means scores, etc.

Also add,

what is the Independent variable: ________________

What is the dependent variable: _____________________

Special Ed Not Special Ed 70 104 65 99 67 95

Question 3

Eight volunteers were randomly divided into two groups for a drug study. Half the participants were given 15 mg of the drug and half received the placebo. The following reaction-time scores that were recorded in seconds. Perform a t test, find d, and interpret the results in sentences format. don't forget to add all the stat symbols as shown in the chapter, beginning with Reject or fail to reject and end with p value. Please show all your work and circle or underline your t, d, t critcal, df, means scores, etcc

15 mg Placebo 25 21 26 20 20 18 27 24

Question 4

For each description, identify a) the independent variable, b) the dependent variable, and c) whether a paired or an independent-samples design is being described

I. A 1957 article in the Journal of Experimental Psychology described the kind of dreams that are reported when you wake a person during REM sleep (rapid eye movement) or at other times during NREM sleep (non-REM). Vivid dreams come from the REM aroused and no dreams or vague dreams from the NREM aroused. Thirsty subjects were in the study. They were awakened during REM sleep and asked about their dreams and, again, during NREM sleep and asked the same a) Independent variable _____________ b) Dependent variable _____________

c) Design _____________

d) df________

II. Brad gathered data on the effect of authority among college students. He had 24 students read and give a rating of quality on a scale of 1-7 to an abstract of a scientific article. For 12 students, the apparent author of the abstract was a person with a title of authority. For the other 12, the apparent author's title was not one of authority. a) Independent Variable _____________ b) Dependent Variable _____________ c) Design _____________ d) df ______________