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A population has a mean of 300 and a standard deviation of 24. A simple random sample of 144...

A population has a mean of 300 and a standard deviation of 24. A simple random sample of 144 observations will be taken. What is the probability that the sample meanwill be between 297 and 303?
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Answer #1

z = [ x - 300 ] / 2

297 < x <303

-0.125 <x - 300/ 24 < 0.125

= 0.58706 - [ 1 - 0.58706 ]

= 0.174


answered by: Amylosta
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