Question

(willing to give 30 points! picture included)

I am super stuck on this one and I really need help with this problem a the moment, I would appreciate it so much.

Joel surveyed 13 classmates to find out the number of days it had been since the last time they were at a grocery store.

A. What was the median number of days represented on Joel's plot?

B. What is the interquartile range of number of days represented on Joel's plot.

C. By how much does the mean of Joel's second data set change in comparison with the mean of the data set in his original survey? Explain how to determine the change in means without calculating the mean of either data set.

Answer 1

A. Median number is the middle number. We can cross one off from left to right to get 4.
B. Interquartile range is Q3-Q1. Q1 is 2 and Q3 is 5, so the interquartile range is 3.
C. I don't know the original set, but an outlier can affect the mean.