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Author Question: A sample of 60 students from a large university was taken. The average age in the sample was 22 ... (Read 97 times)

cagreen833

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on: Jun 24, 2018
A sample of 60 students from a large university was taken. The average age in the sample was 22 years with a standard deviation of 6 years. Construct a 95 confidence interval for the average age of the population.

Question 2

A control chart that is used to monitor the variation of the measurements in a sample is
 a. a p chart.
 b. an X chart.
 c. an R chart.
 d. an np chart.


cam1229

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Reply #1 on: Jun 24, 2018
Answer to Question 1

20.45 to 23.55 years

Answer to Question 2

c


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