College Of The Canyons Math 140 Exam 1 Amy Morrow Page 7
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8College of the Canyons
Math 140 Exam 1
Amy Morrow
Center: The mean weight is 159.39 pounds. The median is 161 pounds. Because the data
is roughly symmetric, the center is best measured with the mean.
Spread: The standard deviation is 34.88, and the IQR is 44.75. Because the data is
roughly symmetric, the spread is best measured by the standard deviation.
Normal?: The normal model is appropriate, and this can be verified by the probability
plot shown below.
(b) Analyze/summarize the gender of individuals in the study. Variable: GENDER.
Solution:
GENDER Percent
female
50.00
male
50.00
A correct solution will include:
Graph: Bar chart (relative or frequency is okay)
Table: Relative or frequency
Comment on “Most”: There were equal numbers of men and women in the study.
(c) Analyze/summarize the relationship between gender and weight of individuals in the study. Vari-
ables: WT, GENDER.
Solution:
Variable
GENDER
Mean
StDev
Median
IQR
Page 7
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