1.A researcher finds that between the ages of 9and 14,there is a strong positive correlation between age and social aggression among girls. He concludes therefore that grown women are likely to be manipulative psychopaths. The mistake he is making is

a.restriction of range

b.inferring causality

c.he needs to check for outliers

d.extrapolating beyond the bounds of his data

2.Regarding the goodness of fit test in chi squared

a.chi squared can be negative

b.none of the answers are true

c.it is a type of correlation

d.we are testing whether the proportions in our sample data reflect some specified population proportions

3.For a set of n = 40 pairs of scores (X and Y values)SS_X*SS_Y= 25, and SSxy = 2.The df and the Pearson correlation for these data is:

df= 38, r = .40

df= 39, r = .40

df= 38, r = .08

df= 42, r = .08

4.Ten years ago, only 15% of the U.S. population consisted of people more than 65 years old.A researcher plans to use a sample of n = 700 people to determine whether the population distribution has changed during the past ten years.If a chi-square test is used to evaluate the data, what is theexpected frequencyfor the older-than-65 category?

a.15

b.65

c.there is no way to calculate

d.105

5.A sample of 120 people is classified by gender (male/female) and by whether or not they are registered voters.The sample consists of 70 females and 50 males, and has a total of 60 registered voters.If these data are used for a chi-square test for independence, what is thetotal number of females for the expectedfrequencies of voters?You will find it helps to set up the table you would use to find expected valuesin the test for independence to answer this question.Once you organize that table the answer is easy...

a.60

b.35

c.120

d.they are all wrong

6.The pearson correlation coefficient r

a.is only appropriate for measuring curvilinear relationships

b.cannot be negative

c.is a kind of ratio,with the amount of variation X and Ysharein the numerator,and the amount that each vary on their own in the denominator.

d.all of the responses are correct

7.the chi squared test for independence

a.tests if two categorical variables are related or not

b.can never use negative data

c.all the answers are correct

d.is like a kind of correlation