A Sample of Size N Is Selected at Random from a Population

question 21

Multiple Choice

A sample of size n is selected at random from a population that has mean  and standard deviation .The sample mean will be determined from the observations in the sample.Which of the following statements about the sample mean is/are TRUE?

• A)The mean of is the same as the population mean (i.e. ,  ).
• B)The variance of is .
• C)The standard deviation of decreases as the sample size grows larger.
• D)All of the above are true.
• E)Only A and B are true.

Analyze and apply the steps required for adjusting pinion bearing preload and understanding its impact on vehicle performance.

Identify the adjustment and functionality of differential carrier thrust screws to ensure proper operation.

Recognize maintenance procedures including lube level checks and the importance of differential carrier oil changes.

Determine the tools appropriate for measuring gear runout and pinion to crown gear runout.

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