Midterm
Don’t leave anything blank. I can always find a way to give you some credit if you’ve made an
attempt. Be sure to post any questions you have after the answers open. Unlike the word
problems in your book, my word problems are not real.
The work you turn in by 11:59 P.M. on July 21
st
must be your own. Please don’t get advice or
suggestions from your spouse, child, friend, or co-worker who just finished a similar class. I’m
happy to provide that advice and those suggestions and then you can resubmit, if you choose, so
there is no reason to cheat.
1.
(one point) A researcher collected BMI (Body Mass Index) of 50 students in an
Engineering school. He found the mean BMI was much smaller than the median BMI.
The reason for this might be___
a. Several students had much smaller BMI scores than the other students
b
. Several students had much larger BMI scores than the rest
c. The researcher made some measurement errors
d. All the students had smaller BMI scores, compared to national average

2. (one point) In the graph, there are two distributions: A and B.
We can know from the graph: