Determine which descriptive statistic or inferential test is appropriate for each problem in this set. Options can only be used once.

Paired samples T

Std Deviation

One way ancova

one way anova

median

mode

2 way anova

chi squared

mean

Pearsons R

Regresson

Independant Samples T test

1. This value gives the average dispersion about the mean of the distribution.

2.A neurosurgeon believes that lesions in certain areas of the brain will decrease pain perception. Five rats received a lesion in the thalamus, and five rats received a lesion in the amygdala. The score representing when flinching observed after a shock administered is compared.

3.This statistic is used to identify the average home price not affected by extreme values.

4.University administrators want to predict graduate students' academic performance (GPA) one year after they enter the program using their GRE scores.

5.A clinical psychologist is interested in the effect that anxiety has on the ability of individuals to learn new material, and whether that depends on the difficulty of the material. An experiment is conducted in which 10 low anxious, 10 medium anxious, and 10 high anxious subjects were randomly assigned to three levels of difficulty (easy, moderate, hard) materials. Subjects were given a memory test 30 minutes after learning the material.

6.A survey conducted among U.S. adults showed that a person's level of optimism is related to his or her subjective ratings of happiness. Both variables were measured using a 7-point Likert scale.

7.A political scientist living in the state is interested in determining whether there is a relationship between political affiliation and attitude toward a bill that proposes to lower the legal drinking age. A random sample of registered voters (Republican, Democrat) were asked about the bill (for, undecided, against). Is the proportion of Republicans who favor the bill equal to the proportion of Democrats?

8.Do depression scores differ for those who received journal therapy and counseling, journal therapy only, or counseling only, assuming no prior differences in depression among the groups?

9.To motivate citizens to conserve gasoline, the government mounted a nationwide conservation campaign. Twelve families were randomly selected, and the amount of gasoline they use is monitored for 1 month before the advertising campaign and for 1 month after the campaign.