A Quality Analyst wants to construct a sample mean chart for controlling a packaging process.He knows from past experience that whenever this process is under control,package weight is normally distributed with a mean of twenty ounces and a standard deviation of two ounces.Each day last week,he randomly selected four packages and weighed each with the following results: What is the standard deviation of the sampling distribution of sample means?
A)0.1 ounces
B)0.4 ounces
C)0.5 ounces
D)1 ounces
E)2 ounces

Question

A Quality Analyst wants to construct a sample mean chart for controlling a packaging process.He knows from past experience that whenever this process is under control,package weight is normally distributed with a mean of twenty ounces and a standard deviation of two ounces.Each day last week,he randomly selected four packages and weighed each with the following results:  What is the standard deviation of the sampling distribution of sample means?
A)0.1 ounces 
B)0.4 ounces 
C)0.5 ounces 
D)1 ounces 
E)2 ounces

Quizplus · Accepted Answer

The Answer of A Quality Analyst wants to construct a sample mean chart for controlling a packaging process.He knows from past experience that whenever this process is under control,package weight is normally distributed with a mean of twenty ounces and a standard deviation of two ounces.Each day last week,he randomly selected four packages and weighed each with the following results:  What is the standard deviation of the sampling distribution of sample means?
A)0.1 ounces 
B)0.4 ounces 
C)0.5 ounces 
D)1 ounces 
E)2 ounces

A Quality Analyst Wants to Construct a Sample Mean Chart