Which of the following is not an assumption of the Chi Square Test?

a) each person may contribute only one response to the contingency table 

b) the variables are measured on either an interval or ratio scale 

c) there are at least 10 responses obtained in each cell of a 2x2 table 

d) there are at least 5 responses obtained in each cell of a 2x3 or larger table

Answer: B

In a two factor between subjects analysis of variance, where the interaction is statistically significant, MSaxb represents the variance due to?

a) the interaction of Factor A with Factor B, and error variance 

b) the effects of Factor A, Factor B and error variance 

c) the interaction of Factor A with factor B 

d) the effects of treatment Factor A and error variance 

e) error variance

Answer: A

In a two-factor between subjects analysis of variance, where Factor A is statistically significant, MSa is the variance due to 

a) the interaction of the two treatment factors and error variance 

b) the effect of Factor A

c) the effect of Factor A with Factor B removed 

d) the effects of Factor A and error variance 

e) error variance

Answer: D

What happens if three predictors are highly correlated in collinearity?

Answer: they are predicting the same variance in Y

What is the best way to make direct comparisons

Answer: compare predictors's betas or standardized slopes

What happens if the three predictors are perfectly correlated

Answer: one goes into the equation because there is nothing the other two could add

Treatment of breast cancer is a controversial issue with treatment varying from radical mastectomy to radiation and chemotherapy combined with simple lumpectomy. One long-term study involved noting survival times of all breast cancer patients from over 100 hospitals and comparing the percentage of women still alive 5 years after radical mastectomies with the percentage of women still alive 5 years after radiation and chemotherapy combined with simple lumpectomy. The results seems to show a better outcome for women who received lumpectomy treatment. Which of the following statements are appropriate?

I. This appears to be a well-conducted controlled experiment.

II. This observational study should be faulted for a lack of blinding.

III. A lurking variable involving who received what treatment makes any conclusion suspect.

A) I only

B) II only 

C) III only

D) I and II

E) II and III

Answer: III only