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the answer highlighted in blue is incorrect. The average age of a student at Central High School is 16.5 years old (#= 16.5) with a

the answer highlighted in blue is incorrect.

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The average age of a student at Central High School is 16.5 years old (#= 16.5) with a standard deviation of 1.5 (a= 1.5). If samples of size 9 (n =9) were taken from the population what would be the standard deviation of the sample means (;) ? 0.5 2 1.0 . 1.5

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