A simple random sample of 50 items resulted in a sample mean of 25.1. The population standard deviation is 2.1. At 95% confidence, what is the margin of error? Hint: The sample size n=50>30, meaning that you can use the normal Z distribution and there's no need to use the t-distribution.

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A: Answer: From the given data, Population standard deviation (σ) = 0.32 Sample size (n) = 49

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A:

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A:

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A:

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A: NOTE: Since we only answer up to 3 subparts , we will answer the first 3. Please resubmit the…

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Q: S = 2722 - 16,900/7 7-1

A: The given equation is:

Q: The Alpha company takes a survey of the age for all employees. The average age is 35 with a standard…

A: