The number of sit-ups that all tenth-grade girls can do in 5 minutes is normally distributed. beth surveyed 20 of her fellow intramural tennis players, all tenth-grade girls, and determined the mean number of sit-ups they could do. can she make an inference about the population mean for all tenth-grade girls based on the sample?

No, it is not possible because she forgot to use a simple random sample.

Step-by-step explanation:

A simple random sample can be defined as a subset of a group of people or animals or things in which the probability of chosen every member of the group is the same. This sampling method is normally used because it is an unbiased method of sampling any set of groups. Therefore, based on the available information, it would be difficult for her to infer the population mean because she forgot to use a simple random sample.

if x decreases by 4 then y increases by 10

step-by-step explanation: