Jack is a farmer and he wants to know the mean weight of all the potatoes in a sack.

He randomly selects 10 potatoes and weighs them. Their weights, to the nearest ounce are 5, 8, 9, 11, 7, 7, 8, 9, 12, and 7.

What is the best estimate of the mean weight of all the potatoes in the sack?

Round to the nearest ounce.

To calculate the mean weights of the potatoes, the weights are all added and divided by the number of potatoes.

The sum of all the potatoes - 5 + 8 + 9 + 11 + 7 + 7 + 8 + 9 + 12 + 7 = 83

the number of potatoes - 10

we have to divide the sum of weights by 10

Mean weight = 83/10 = 8.3

Rounded off to the nearest ounce - 8 ounces