Question

Sixty-five randomly selected car salespersons were asked the number of cars they generally sell in one week. Fourteen people answered that they generally sell four cars; nineteen generally sell five cars; twelve generally sell six cars; nine generally sell seven cars; eleven generally sell eight cars. Calculate the following. (Round your answer to two decimal places.) sample mean = x

Answer 1

The sample mean is 5.75 cars per week.

There are 65 salespeople interviewed and they sold various number of cars.

The sample mean would be the total number of cars sold divided by  the number of sales people:

= Total number of cars sold / Number of salespeople

= ( (14 x 4) + (19 x 5) + (12 x 6) + ( 9 x 7) + (11 x 8) ) / 65

= 374 / 65

= 5.75 cars per week

On average, 5.75 cars are sold per week by the salespeople.

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