1 In a two sample t procedure the populations are dependent

1.) In a two sample t procedure the populations are dependent from each other. True or False

2.) Which of the following equations are valid:

A. SSE=SST-SSTr

B. MST = MSTr+MSE

C. SST = SSE-SSTr

3. Give an example of a categorical variable:

4) What does a test of significance deal with?

a) Is the difference important

b) What caused the difference?

c) Was the experiment properly designed?

d) Is the difference due to chance?

e) All of the above

5. In a linear regression analysis, if R^2 is 1.0, then the

a) SSE must be 0

b) SSE must be 1.0

c) SSR must be 1.0

d) SSR must be 0

6. Does drinking coffee during pregnancy affect the weight of the newborn? The weights of newborns were measured from 30 mothers who drank 1 cup of coffee per day, 30 mothers who occasionally had a cup of coffee, and 30 mothers who did not drink any coffee during pregnancy. What analysis should be used for this data?

Solution

1)  In a two sample t procedure the populations are dependent from each other. This statement is True.

Both variables are dependent and sample sizes are equal

2) Total sum of squares= Treatment sum of sqaures- Error sum of squares

SST= SStr +SSE

Option A is correct

3) Categorical variable is nothing but qualitative variable. qualitative variable means which we can not measure numerically

Ex: Taste, Honest, Intelligence

5) In a linear regression analysis, if R^2 is 1.0, then the SSE must be 0