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some business analysts estimate that the length of time people work at a job has a...

some business analysts estimate that the length of time people work at a job has a mean of 9.2 years with a standard deviation of 3.5 years.

What is the mean and standard deviation of the sampling distribution for the length of time people work at a job for random samples of 16 people? Would we consider the sampling distributions to be approximately normal;?

Math   Statistics-And-Probability   
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Answer #1

Given that,

mean = = 9.2

standard deviation = = 3.5

n = 16

sampling distribution of sample mean = 9.2

sampling distribution of standard deviation = / n =3.5 / 16=0.8750

sampling distributions to be approximately normal : yes

sampling distributions is always normal distribution

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