The Confidence Interval $4.40 < \sigma < 6.39$ , for the Population Standard Deviation Is Based on the the Population

question 30

Multiple Choice

The confidence interval, $4.40 < \sigma < 6.39$ , for the population standard deviation is based on the following sample statistics: $\mathrm { n } = 41 , \overline { \mathrm { x } } = 42.1$ , and $\mathrm { s } = 5.2$ . What is the degree of confidence?

• A) 80%
• B) 99%
• C) 90%
• D) 95%

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Definitions:

Two-sample Z-test

A statistical test used to determine whether there is a significant difference between the means of two groups.

Population Proportions

The fraction of individuals in a population having a particular property or characteristic.

Confidence Interval

A constellation of values, derived from the statistical inquiry of samples, assumed to cradle the value of an invisible population parameter.

Product Recognition

The ability to identify a product by its features, brand, or other distinguishing characteristics.