Exercises

Date: 2015-10-07; view: 480.

Modal class

The mode for grouped data is the modal class. The modal class is the class with the largest frequency.

Example:

Find the mode of the frequency distribution

Solution:

The modal class is 20-25, since it has the largest frequency. Sometimes the midpoint of the class is used rather than the boundaries; hence the mode could be given as 22.5.

1. Dinner check amounts at the restaurant have the following frequency distribution:

Compute the mean, median, and mode for the above data.

2. The following table gives the frequency distribution of entertainment expenditures (in dollars) in curried by 50 families during the past week.

Find the mean, median and mode.

3. The following table gives the frequency distribution of total hours studying during the semester for sample of 40 university students enrolled in an introductory business statistics course .

Find the mean, median, and mode

4. This frequency distribution represents the data obtained from sample of 75 copying machine service technicians. The values represent the days between service calls for various copying machines.

Find the mean, median, and mode.

5. For 35 antique car owners, the following distribution of cars' age was obtained. Find the mean, median, and mode.