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In a study to test the effects of science fiction movies on people's belief in the supernatural, seven people completed a measure of belief in the supernatural before and after watching a popular science fiction movie. Participants' scores are listed below.

 

Belief-in-Supernatural Scores

Participant   Before   After

A            6         9 

B            3         5 

C            6         6 

D            5         2

E            1         7 

F            3         8 

G            2        3

 

55. What kind of hypothesis test will you use to analyze this dataset?

 

56. Using the .01 significance level, carry out a t test to test the experimenter's assumption that the participants' belief in the supernatural would change in some way after watching the movie.

What kind of hypothesis test will you use to analyze this dataset?

A psychologist theorized that people can hear better when they have just eaten a large meal. Six individuals were randomly assigned to eat either a large meal or a small meal. After eating the meal, their hearing was tested. The hearing ability scores (high numbers indicate greater ability) are given in the following table. Using the .05 level, do the results support the psychologist’s theory?

48. What kind of hypothesis test will you use to analyze this dataset?

A genetic experiment involving peas yielded one sample of offspring consisting of 400 green peas and 165 yellow peas. Use a 0.05 significance level to test the claim that under the same circumstances. 234, of offspring peas will be yellow. Identify the null hypothesis, alternative hypothesis, test statistic, P.value, conclusion about the null hypothesis, and final conclusion that addresses the original claim. Use the P.value method and the normal distribution as an approximation to the binomial distribution.

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