College Of The Canyons Math 140 Exam 1 Amy Morrow (Page 3 of 8) in pdf

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College of the Canyons

Math 140 Exam 1

Amy Morrow

(a) Which is largest? (Choose the best answer)

(b) Which is smallest? Circle one. (Choose the best

answer)

A. Mean

B. Median

B. Location of the Mode

C. Location of the Mode

C. Median

A. Mean because it is closer to the lower number of emails

B. Median because it is closer to the higher numbers of emails

C. Mean because it is closer to the higher numbers of emails

D. Median because it is closer to the lower numbers of emails

(d) Which measure of spread is best for the data? Circle one. (Choose the best answer)

A. Standard deviation because the data potentially has outliers

B. Range because the histogram is unimodal

C. IQR because the data is skew

(e) Based on the histogram, create a sketch (by hand) of the corresponding box plot.

Solution: Keys: Stretches from 0 to 8, left whisker shorter than right, median line on box

closer to low side

(f) Which is true of the data shown in the histogram? Circle one of A-E below.

I. The mean and median are approximately equal

II. The data is symmetric

III. The median and IQR to summarize this data are better than the mean and standard deviation.

(Choose the best answer)

A. I and II

D. I, II, and III

B. I only

C. III only

E. I and III

6. The boxplots show prices of used cars (in thousands

of dollars) advertised for sale at three diﬀerent car

dealers. For each question below, choose one from

Ace, BuyIt, or Carz.

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