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Aloiza [94]
2 years ago
5

A statistics practitioner would like to estimate a population mean to within 50 units with 99% confidence given that the populat

ion standard deviation is 250. What sample size should be used
Mathematics
1 answer:
cricket20 [7]2 years ago
3 0

Answer:

Step-by-step explanation:

Using the sample size formula

n= (zs/e)²

z is the z score at 99% = 2.58

s is the standard deviation = 250

e is the sample mean = 50

Substitute

n = (2.58×250/50)²

n = (2.58×5)²

n = (12.9)²

n=166.41

hence the sample size is 166.41

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