A.R-square in regression...

Group of answer choices

1. tells you the proportion of variance in the dependent variable accounted for by the independent variable(s).
2. determines the strength of a relationship between two ordinal variables
3. is not a real statistical concept
4. tells you the probability that the null is true

B.A valid percent....

Group of answer choices

1. is the percent of observations not including the "no answer" or some other related response to an item
2. is the percent of observations on a value after excluding data determined to be invalid
3. is a fake statistical concept
4. the percent of observations of all the values in the sample

C.Which of the following tests would be used to determine if a presumed mean is reasonable given an sample of a single interval variable?

Group of answer choices

1. t test for one sample
2. simple regression
3. chi-square one sample
4. mean test of specificity

D.Which is the following is NOT a level of measurement?

1. pernual
2. nominal
3. interval
4. ordinal