1) a distribution is more efficient if the data are

Group of answer choices

not closely clustered

closely clustered

represented as ordinal

represented as interval ratio

2)When using standard deviation of a sample in calculating confidence interval, what does the expression under the square root look like?

Group of answer choices

s

N

N-1

n-1

n

3) In determining the sample size, as our margin of error increases our sample size

Group of answer choices

increases

remains the same

Margin of error is not used in calculating sample size

decreases