Question

a random sample of middle school students is surveyed about their texting behavior, and the average number of text messages sent per day by this sample is reported to be 54. we should call the number 54 a
a. variable because it describes something that differs among individuals in a sample.
b. parameter because the sample is representative of all middle school students.
c. margin of error because the number will not perfectly match what is going on in the population.
d. statistic because it summarizes results from individuals included in a sample.
e. category because it classifies students as either texting a little or texting a lot.

Explanation:

A statistic is a numerical summary of a sample. Here, 54 is the average number of text - messages sent per day by a sample of middle - school students. A variable is a characteristic that can take on different values for different individuals. A parameter is a numerical summary of a population. The margin of error is related to the uncertainty in estimating a population parameter from a sample statistic. A category is a non - numerical way of classifying data.

Answer:

D. statistic because it summarizes results from individuals included in a sample.