Question

The line plot displays the number of roses purchased per day at a grocery store.

A horizontal line starting at 1 with tick marks every one unit up to 10. The line is labeled Number of Rose Bouquets, and the graph is titled Roses Purchased Per Day. There is one dot above 1 and 2. There are two dots above 8. There are three dots above 6, 7, and 9.

Which of the following is the best measure of center for the data, and what is its value?

The median is the best measure of center, and it equals 6.5.
The mean is the best measure of center, and it equals 7.
The median is the best measure of center, and it equals 7.
The mean is the best measure of center, and it equals 6.5.

Answer 1

The best measure of center for this data is the median, and its value is 7.

To determine the median, we arrange the data points in ascending order: 1, 2, 6, 6, 6, 7, 7, 7, 8, 8, 9, 9, 9.

Since there are 13 data points, the middle value is the 7th data point, which is 7. Therefore, the median is 7.