34. When n (rather than n 1) appears in the formula for the standard deviation,

Question

34. When n (rather than n 1) appears in the formula for the standard deviation, the sample standard deviation is being used for

a) general purposes.

b) descriptive purposes.

c) analytical purposes.

d) estimation purposes.

35. Even when the normality assumption is violated, the t test retains much of its accuracy as long as the

a) population standard deviation is known.

b) sample size isn't too small.

c) observed value of t isn't too large.

d) sample standard deviation isn't too small

36. A property of all hypothesis tests is that

a) common outcomes cause the null hypothesis to be rejected.

b) rare outcomes cause the null hypothesis to be rejected.

c) common outcomes occur about as often as rare outcomes.

d) rare outcomes could reflect an unduly small sample size.

Explanation / Answer

34) answer is (b) descriptive purposes as descriptive purpose means the use of statistical techniques to present information about the data set being studied.

35) answer is (b) sample size isn't too small because of the property of central limit theorm that n should be of minimum size

36) answer is (b) rare outcomes cause the null hypothesis to be rejected as the outcome is not probable

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