The Standard Deviation for the Checking Account Balances Is Assumed

question 136

True/False

The standard deviation for the checking account balances is assumed known to be $357.50. Recently, a bank manager was interested in estimating the mean balance. To do this, she selected a random sample of 81 accounts and found a mean balance of $1,347.20. At a 95 percent confidence level, the lower limit for the confidence interval is $646.50.

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Definitions:

Licensure Exam

A formal assessment that certifies individuals as qualified to engage in a profession or vocational activity, ensuring they meet the required standards.

Mean

In statistics, the mean is a measure of central tendency, calculated by summing all values in a dataset and dividing by the number of values.

Range

The difference between the highest and lowest values in a set of numbers, indicating the spread or dispersion.

Grade Equivalent

A statistical measure used in educational testing to compare a student's performance with the average performance of students at a particular grade level.