Intro Stats, Books a la Carte Edition (5th Edition)
5th Edition
ISBN: 9780134210285
Author: Richard D. De Veaux, Paul Velleman, David E. Bock
Publisher: PEARSON
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Chapter R, Problem 2.40RE
a.
To determine
Obtain a straight line to be the relationship between weight and year.
b.
To determine
Explain whether a straight line seem reasonable.
c.
To determine
Predict the average weight of the team for the year 2015 and explain whether this is reasonable.
d.
To determine
Predict the average weight of the team for the year 2103 and explain whether this is reasonable.
e.
To determine
Predict the average weight of the team for the year 3003 and explain whether this is reasonable.
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Suppose a student’s final grade in a biology course is determined using the following weights.
Quizzes are worth 5%
Exam 1 is worth 20%
Exam 2 is worth 20%
Lab reports are worth 15%
Research paper is worth 15%
Final exam is worth 25%
Just before the final she earned the following grades.
Lab report Grades 75,90, 85, 69, 70, 75, 80, 75
Quiz Grades 85, 80, 0, 60, 70, 80, 80, 75
Exam 1 80
Exam 2 70
Paper 85
What is her lab report percent average?
What is her quiz percent average?
What is course grade before the final?
For a B she needs a course average of at least 82%. What is the lowest grade she can get on the final and achieve the goal?
2. Which gender is taller, males or females? A sample of 14-year-olds from the United
Kingdom was randomly selected using the CensusAtSchool website. Create an appropriate
stemplot. Here are the heights of the students (in cm):
Male: 154, 157, 187, 163, 167, 159, 169, 162, 176, 177, 151, 175, 174, 165, 165, 183, 180
Female: 160, 169, 152, 167, 164, 163, 160, 163, 169, 157, 158, 153, 161, 165, 165, 159, 168, 153, 166,
158, 158, 166
Plot the data below using the stem and leaf method.
a) 320,332,339,343,345,348,351,352,364,376
Chapter R Solutions
Intro Stats, Books a la Carte Edition (5th Edition)
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