The 75th percentile is also the

Excel’s __________ function can be used to compute the sample covariance.

Excel’s __________ function can be used to compute the sample variance.

The population variance can never be

The standard deviation 

The numbers of hours worked (per week) by 400 statistics students are shown below. Number of hours Frequency 0 – 9 20 10 – 19 80 20 – 29 200 30 – 39 100 ​ The cumulative percent frequency for students working 10 or more hours per week is

Exhibit 3-3Suppose annual salaries for sales associates from a particular store have a bell-shaped distribution with a mean of $32,500 and a standard deviation of $2,500. Refer to Exhibit 3-3. The z-score for a sales associate from this store who earns $28,000 is

If we want to calculate the mean of a data set, Excel’s ______ function can directly return the sample mean? 

A tabular summary of a set of data showing the fraction of the total number of items in several classes is a _____ distribution.

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