Sample Size Considerations

Statistics
Tutor: None Selected Time limit: 1 Day

A chain of automotive repair stores wishes to estimate, to within five percentage points, the proportion of all passenger vehicles in operation that are at least five years old, with 98% confidence. Estimate the minimum size sample required.

Mar 16th, 2015

I am not finding complete data !!!

we have given E = 5%  or 0.05

std deviation  (sigma) = ?

and Z(alpha/2) = Zscore at 98% Confidence level



Mar 16th, 2015

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Mar 16th, 2015
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Mar 16th, 2015
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