Question

Given a normal distribution with mu=103 and sigma?=15 , and given you select a sample of...

Given a normal distribution with

mu=103

and

sigma?=15 ,

and given you select a sample of

n=9

What is the probability that

Upper X overbarX

is less than

95 ?

Math   Statistics-And-Probability   
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Homework Answers

Answer #1

= 103

= 15

n = 9

= 103

=

= 5

For sampling distribution of mean, P( < 95) = P(Z < (95 - ) / )

= P(Z < (95 - 103)/5)

= P(Z < -1.6)

= 0.0548

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