As a General Rule, the Normal Distribution Is Used to Approximate

question 162

Multiple Choice

As a general rule, the normal distribution is used to approximate the sampling distribution of the sample proportion only if which of the following conditions holds?

• A) The sample size n is greater than 30.
• B) The population proportion p is close to 0.50.
• C) The underlying population is normal.
• D) np and n(1 - p) are both greater than 5.

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Definitions:

Normally Distributed

Describes a probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean.

Starting Salaries

The initial amount of money that an employee earns annually when beginning a new job.

Standard Deviation

A system for evaluating the degree of dispersion or deviation among a collection of statistics.

Normally Distributed

A type of distribution in which data is symmetrically distributed with most of the observations clustering around the central peak and the probabilities for values further away from the mean tapering off equally on both sides.