Bundle: Understandable Statistics: Concepts And Methods, 12th + Jmp Printed Access Card For Peck's Statistics + Webassign Printed Access Card For ... And Methods, 12th Edition, Single-term
12th Edition
ISBN: 9781337758925
Author: Charles Henry Brase, Corrinne Pellillo Brase
Publisher: Cengage Learning
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Textbook Question
Chapter 3.2, Problem 14P
Basic Computation: Coefficient of Variation, Chebyshev Interval
Consider sample data with
- (a) Compute the coefficient of variation.
- (b) Compute a 75% Chebyshev interval around the sample
mean .
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Basic Computation:Coefficient of Variation,Chebyshev Interval
Consider sampledata with x̅ = 15 and s = 3.
(a) Compute the coefficient of variation.
(b) Compute a 75% Chebyshev interval around the sample mean.
Find the range, variance, and standard deviation of the SAMPLE.
Range :
Variance:
Standard Deviation:
X
"X" -X ̅
"(X" -X ̅)2
12
6
3
10
15
4
5
8
12
5
Total: 80
Find the range, variance, and standard deviation of the POPULATION.
Range:
Variance:
Standard Deviation:
X
"X" -X ̅
"(X" -X ̅)2
12
6
3
10
15
4
5
8
12
5
Total: 80
the life of two brands of canned tires durability is a feature of interest to the manufacturer. Eight brand 1 tires and six brand 2 tires were tested. Customers prefer tires with high levels of life. The data below shows the life for both brands, in thousands of kilometers.
(Image)
a) Test the hypothesis of equality of variances for the life of the two tire brands. This is a two-sided (bilateral) test. Use an α = 0.05.
b) Test the hypothesis of equality of means for the life of the two tire brands. Use α = 0.05.
Which tire brands would you buy, if the price is the same?
Chapter 3 Solutions
Bundle: Understandable Statistics: Concepts And Methods, 12th + Jmp Printed Access Card For Peck's Statistics + Webassign Printed Access Card For ... And Methods, 12th Edition, Single-term
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