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7. Sampling Distributions & Confidence Intervals: Mean
Sampling Distribution of the Sample Mean and Central Limit Theorem
7. Sampling Distributions & Confidence Intervals: Mean

Sampling Distribution of the Sample Mean and Central Limit Theorem: Videos & Practice Problems

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Problem 33Multiple Choice

The distribution of the time to complete a vehicle safety inspection is skewed to the right. Records show the mean inspection time is 9.89.8 minutes with a standard deviation of 4.14.1 minutes. What sample size is commonly required so that the sampling distribution of the sample mean can be approximated by a normal distribution for probability calculations?