Question

-Unless R _____, a multiple regression will never make perfectly accurate predictions.

equals 1.00

is practically significant

equals 0.00

is statistically significant

-Samantha is interested in testing whether college students choose to major in psychology at a significantly higher rate than they choose to major in education. Which statistical analysis should she use?

Spearman rank-order correlation coefficient

chi square test of independence

chi square goodness of fit test

Mann–Whitney U test

-The alternative hypothesis for a chi-square goodness-of-fit test is that the distribution of the characteristic:

in the sample is the same as the distribution of the population

will be distributed evenly across all levels of the sample

in the sample is different from the distribution of the population.

will differ between two samples.

-Shawndai is interested in testing whether ethnic differences exist among patrons of the local coffee shop. If she observes African Americans, Hispanics, Asian Americans, and Caucasians, how many degrees of freedom would Shawndai have in her study?

three

two

four

five

Answer 1

Unless R _____, a multiple regression will never make perfectly accurate predictions.

equals 1.00

Samantha is interested in testing whether college students choose to major in psychology at a significantly higher rate than they choose to major in education. Which statistical analysis should she use?

Mann–Whitney U test

The alternative hypothesis for a chi-square goodness-of-fit test is that the distribution of the characteristic:

in the sample is different from the distribution of the population.

Shawndai is interested in testing whether ethnic differences exist among patrons of the local coffee shop. If she observes African Americans, Hispanics, Asian Americans, and Caucasians, how many degrees of freedom would Shawndai have in her study?

three