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A Random Sample of Size 20 Taken from a Normally

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A random sample of size 20 taken from a normally distributed population resulted in a sample variance of 32. The lower limit of a 90% confidence interval for the population variance would be:  A. 52.185. B. 20.375. C. 20.170. D. 54.931.\begin{array}{|l|l|}\hline\text { A. } & 52.185 . \\\hline \text { B. } & 20.375 . \\\hline \text { C. } & 20.170 . \\\hline \text { D. } & 54.931 . \\\hline\end{array}

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Definitions:

Median

The median is the central number in a set of data that has been organized in either increasing or decreasing sequence.

Bimodal Data

A distribution of data showing two distinct peaks or modes, indicating two predominant values within the dataset.

Population Mean

The mean of all members of a whole population, representing the central tendency of the population data.

Sample Mean

The average of a set of observations or scores taken from a sample.

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