A Population Has a Standard Deviation of 50

question 36

Multiple Choice

A population has a standard deviation of 50. A random sample of 100 items from this population is selected. The sample mean is determined to be 600. At 95% confidence, the margin of error is

• A)5
• B)9.8
• C)650
• D)609.8

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Definitions:

Analysis of Variance

A statistical method used to compare the means of three or more samples to find out if at least one is significantly different from the others.

Population Means

The average value of a particular characteristic across all members of a defined population.

Independent Random Sampling

A method of sampling where each member of the subset is chosen randomly and entirely by chance, ensuring that every subset of the population has an equal opportunity of selection.

Pooled Estimator

A method to estimate a common mean or variance from several different populations by combining or pooling sample statistics.