Question

You work at an auto-repair shop and need to know the mean number of tire sets sold daily. Last week, 10, 9, 5, 8, 4, and 6 tire sets were sold. Your employee's mean calculation is shown below. The employee's answer is wrong because they ____. The correct mean number of sets of tires sold last week is ___.

Answer 1

To calculate the mean number of tire sets sold daily, sum the daily sales and divide by the number of days. Last week's total sales were 42 tire sets, and the correct mean number of tire sets sold per day is 7.

Step-by-step explanation:

To calculate the mean number of tire sets sold daily, we need to sum up the number of sets sold each day and then divide that sum by the total number of days. Last week, the sets sold were: 10, 9, 5, 8, 4, and 6. Let's calculate the total:

• 10 + 9 + 5 + 8 + 4 + 6 = 42 tire sets

There are 6 days represented in the data, so the mean is:

• 42 tire sets / 6 days = 7 tire sets per day

The employee's answer is wrong because they likely made an error in either the addition of the daily sales or the division by the number of days. The correct mean number of sets of tires sold last week is 7.