Use the Given Information to Find the Minimum Sample Size $\mu$

question 132

Multiple Choice

Use the given information to find the minimum sample size required to estimate an unknown population mean $\mu$
-How many women must be randomly selected to estimate the mean weight of women in one age group. We want 90% confidence that the sample mean is within 2.1 lb of the population mean, and the population standard
Deviation is known to be 19 lb.

• A) 315
• B) 278
• C) 445
• D) 222

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