Question

biologists studying wildlife in the state parks want to estimate the average weight of chipmunks. they measured the weights of 5 chipmunks from each of 10 parks. the mean of the data was 91 grams, and the median was 87 grams. which predictions match the data?
about one - half of the chipmunks weigh more than 91 grams.
the average weight of the chipmunks is 87 grams.
about one - half of the chipmunks weigh more than 87 grams.
the average weight of the chipmunks is 91 grams.

Explanation:

Step1: Recall the definitions of mean and median

The mean is the average value of a data - set, calculated by summing all values and dividing by the number of values. Here, the mean weight of chipmunks is 91 grams, so the average weight of the chipmunks is 91 grams. The median is the middle value when the data is arranged in ascending or descending order. For a data - set, about half of the values are greater than the median and about half are less than the median. Here, the median is 87 grams, so about one - half of the chipmunks weigh more than 87 grams.

Answer:

C. About one - half of the chipmunks weigh more than 87 grams; D. The average weight of the chipmunks is 91 grams