Commute Distances for Employees of a Large Company Have a Distribution

question 30

Multiple Choice

Commute distances for employees of a large company have a distribution that is quite skewed. Suppose the mean commute distance is 20 miles and that the standard deviation is 7 miles. What can be said about the mean commute distance for a random sample of size 49 employees from this plant? ​

• A)The distribution of will be approximately normal with mean 20 and standard deviation 7.
• B)The distribution of will be approximately normal with mean 20 and standard deviation 1.
• C)The mean and standard deviation of will be 20 and 7, but the sampling distribution of will not be approximately normal.
• D)The mean and standard deviation of will be 20 and 1, but the sampling distribution of will not be approximately normal.
• E) will have a standard normal distribution.

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Definitions:

Phosphorus

A reactive, non-metallic element found in Group 15 of the periodic table, essential for life.

Calcium

A chemical element with the symbol Ca and atomic number 20, a reactive, pale yellow metal that forms compounds with many other elements.

Ionic Formula

A notation that represents the composition of an ionic compound by showing the ratio of ions present in the compound.

Compound

A substance formed from two or more chemical elements chemically bonded together, with a fixed ratio determining its composition.