Solution-Shape of the sampling distribution

Shape of the sampling distribution

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In a large population of US cell phone owners, the mean number of contacts is 112 with a standard deviation of 20. Suppose 200 cell phone owners are randomly selected for a market research campaign. What is the shape of the sampling distribution of the sample mean number of contacts?

Approximately Normal, because the sample size is greater than 30.
We cannot say, because 200 cell phone owners is less than 10% of the population.
We cannot say, because the sample size is greater than 30.
Approximately Normal, because it is reasonable to assume that this population is Normally distributed.
Approximately Normal, because 200 cell phone owners is less than 10% of the population.

Reference no: EM131051699

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Shape of the sampling distribution

Reference no: EM131051699

Reference no: EM131051699

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