For Sample Sizes Greater Than 30,the Sampling Distribution of the Mean

question 73

Multiple Choice

For sample sizes greater than 30,the sampling distribution of the mean is approximately normally distributed:

• A)regardless of the shape of the population.
• B)only if the shape of the population is symmetric.
• C)only if the population is normally distributed.
• D)None of these choices.

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Definitions:

Standard Error

Measures the accuracy with which a sample represents a population, showing the dispersion of sample means around the true population mean.

Test Statistic

A standardized value derived from sample data during a hypothesis test that is used to determine the p-value or to compare against the critical value.

Population Means

The average value of a set of characteristics or figures for the entire population.

Credit Purchases

Transactions where goods or services are acquired with an agreement to pay later, often using a credit card or account.