9. TRUE or FALSE (2 points each, 20 points total) T F a. For a normal population a larger mean implies a larger standard deviation. T F b. If we reject H0 then we way we have evidence to support H1 T F c. If we take a large random sample, the mean will equal the median.

T F d. The standard deviation of a set of observations decreases with increasing

sample size

T F e. If = 0, then we can never make a Type 2 error

T F f. For n 2, the standard error of the mean is always larger than the standard

deviation of the population

T F g. In any symmetric distribution, an equal number of observations lie above

and below the mode.

T F h. We use a matched pair experimental design in order to remove the effect of

extraneous variables when testing H0: 1 = 2

T F i. If we fail to reject H0 then we never make a Type 1 error

T F j. The decision rule for the 2 test for qualitative data always uses both tails

of the 2 distribution.