Please help me The question is in the picture ;(
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Answer:
Approximately 63 business students must be randomly selected to estimate the mean monthly earnings of business students at one college
Step-by-step explanation:
confidence interval = 95%
Standard deviation = 569
= 1 - 0.95 = .05
=
= 1.96
We want 95% confidence that the sample mean is within $140 of the population mean
margin of error ( E ) =140
let n be the sample size
margin of error ( E ) =
squarring both side
n = 63.45
n =63 approximately