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Mathematics, 23.07.2019 16:30, heavyhearttim
The advertising department of a nationally circulated magazine wishes to estimate the mean age of. its subscribers to within 0.5 year with 90% confidence. if they estimate that the standard deviation of the ages of their subscribers is 5 years, find the required sample size. a. 165 b. 17 c. 271 d. 45 1 points first question previous question question 14 of 30 next question last question
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