Question

A coffee shop surveyed three groups of 5 customers to find out how many cups of coffee the customers drink in one day. The table shows the results of the three samples.

Group 1 {1, 3, 2, 2, 4}
Group 2 {4, 1, 3, 2, 1}
Group 3 {5, 4, 6, 4, 6}

Identify any surveys that are likely biased. Based on the unbiased surveys, estimate the mean number of cups of coffee the customers drink in one day.

Enter your answer in the box. Round to the nearest whole number.

Answer 1

Based on the unbiased surveys, the mean number of cups of coffee the customers drink in one day is two.

Explanation:

I took the quiz

Answer 2

Answer: The mean number of cups of coffer per person was 3.2 cups.

There is nothing in the problem that leads me to believe that the surveys were biased (Was there more to this problem?).

Therefore, we will use all of the values to find the mean. Add up all the values and we have a total sum of 48. Now, divide by 15 to get a mean on 3.2.