A group of concerned citizens are collecting water samples from a local river to detect the level of nitrogen in the water.They plan to take samples every day for a month and then will divide the sum by the number of days they sampled.Which of the following answers most completely describes what the group is trying to do?
A)determine the mean level of nitrogen in the water
B)determine the average level of nitrogen in the water
C)determine the confidence level of the sample
D)both determine the mean level of nitrogen in the water and determine the average level of nitrogen in the water
E)both determine the average level of nitrogen in the water and determine the confidence level of the sample

Question

Quizplus · Accepted Answer

The group is calculating the sum of daily nitrogen levels and then dividing by the number of days, which is the process for finding both the mean and the average. Mean and average are synonymous in this context, so both A and B are correct, making D the most complete answer. Confidence level (choice C) refers to a different statistical concept not described by the group's actions.

A Group of Concerned Citizens Are Collecting Water Samples from a Local