### HINTS FOR REVIEW PROBLEMS FOR FINAL EXAM M358K, Sp 06 Smith

#3. For Step 2, it may help to review the sampling distribution of p-one-hat.

#5 For part (b), yoiu should be able to rephrase the question in the first
paragraph in the form, "Are the distributions of variable Y the same in
populations 1 and 2?" You need to figure out what variable Y is and
what the two populations are.

For part (c), remember that when you have a two-way table with just two
categories in each categorical variable, the chi-squared test is
equivalent to a certain test for proportions. In other words, you
should be able to rephrase the question in the first paragraph in
the form, "Is the proportion of population A that has property X the
same as the proportion of population B that has property X?" You need
to figure out what A, B, and X are.

#6: Exactly one of parts d, f, j, and n is each of the following:

Two-sample t-test

Matched pair one sample t-test

One sample t-test (not matched pairs)

None of the above -- there is a
confounding factor that makes the study design inappropriate.

Hint for parts b, c, g, and i: When is the chi-squared approximation good ehough to use? (See p. 597, paragraph below the box.)

#13: Try using the formula for slope.

#14: Do you have an SRS or something that might reasonbly be considered one?

#15(b): What about the shape of a distribution can tell you which numerical summary is more appropriate?