2 years ago

A recent survey of 8,000 high school students found that the mean price of a prom dress was $195.00 with a standard deviation

1 answer:

7 0

Answer:

The z score can be calculated by the difference of population and sample mean divided by standard error. Standard error can be calculated as the standard deviation divided by square root of sample size From the given the standard error: SE = 12/sqrt (20) = 2.68 Z = (208 -195)/2.68 = 4.85

Explanation:

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