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Consider a population of 200 with a mean of 60 and a standard deviation equal to...

Consider a population of 200 with a mean of 60 and a standard deviation equal to 21. What is the probability of obtaining a sample mean of 63 or less from a sample of 35​?

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Answer #1

Solution :

Given that ,

mean = = 60

standard deviation = =21

n = 35

= = 60

= / n = 21 / 35 = 3.55

P( < 63 ) = P(( - ) / < (63 - 60) / 3.55 )

= P(z < 0.85 )

Using z table

= 0.8023   

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