Question

When working with either the sample mean or the sample proportion, if we want the margin...

When working with either the sample mean or the sample proportion, if we want the margin of error to be cut in half, we need to:

Select one:

a. Double the sample size.

b. Triple the sample size.

c. Quadruple the sample size.

d. Multiply n by 5.

Homework Answers

Answer #1

Quadruple the sample size (c)

[ explanation:-

i am explaining the case of mean.

let us consider. the populations sd is , z critical value ,margin of error E.

the needed sample size was:-

when margin of error is halved, the needed sample size be:-

]

*** if you have any doubt regarding the problem ,please write it in the comment box...if satisfied,please UPVOTE.

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