Consider Estimating the 95% Confidence Interval for the Difference Between

question 56

Multiple Choice

Consider estimating the 95% confidence interval for the difference between two population means with a desired margin of error of 5 cm. What would the approximate (i.e., using the 2SE rule of thumb) minimum sample size be for each of the samples if the population standard deviation is 15 cm?

• A) n = 60
• B) n = 72
• C) n = 84
• D) n = 96

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