1. Elena would like to know the average height of seventh graders in her school district. She measures
the heights of everyone in a random sample of 20 students. The mean height of Elena's sample is 61
inches, and the MAD (mean absolute deviation) is 2 inches.
Select all the true statements. Make your selections bold.
A.
The median height of the sample must be between 59 and 63 inches.
B. Another random sample of 20 students is likely to have a mean between 57 and 65 inches.
C.
The mean height of these 20 students is likely to be the same as the mean height of all
students in the district.
D.
The mean height of these 20 students is likely to be the same as the mean height of a second
random sample of 20 students.
E.
Elena would be more likely to get an accurate estimate of the mean height of the population
by sampling 40 people instead of sampling 20 people.