The life expectancy of a fluorescent light bulb is given by the number of hours that it will burn. From the following frequency distribution, find the sample standard deviation s (in h). (Use the mean value 2,193.5 h to calculate the sample standard deviation rounded to the nearest whole number.) Life of bulb Midpoint Frequency Product (hours) xf -0.5-499.5 249.5 3 748.5 499.5-999.5 749.5 11 8,244.5 999.5-1,499.5 1,249.5 14 17,493 1,499.5-1,999.5 1,749.5 17 29,741.5 1,999.5-2,499.5 2,249.5 28 62,986 2,499.5-2,999.5 2,749.5 33 90,733.5 2,999.5-3,499.5 3,249.5 14 45,493 3,499.5-3,999.5 3,749.5 18,747.5 S =
The life expectancy of a fluorescent light bulb is given by the number of hours that it will burn. From the following frequency distribution, find the sample standard deviation s (in h). (Use the mean value 2,193.5 h to calculate the sample standard deviation rounded to the nearest whole number.) Life of bulb Midpoint Frequency Product (hours) xf -0.5-499.5 249.5 3 748.5 499.5-999.5 749.5 11 8,244.5 999.5-1,499.5 1,249.5 14 17,493 1,499.5-1,999.5 1,749.5 17 29,741.5 1,999.5-2,499.5 2,249.5 28 62,986 2,499.5-2,999.5 2,749.5 33 90,733.5 2,999.5-3,499.5 3,249.5 14 45,493 3,499.5-3,999.5 3,749.5 18,747.5 S =
A First Course in Probability (10th Edition)
10th Edition
ISBN:9780134753119
Author:Sheldon Ross
Publisher:Sheldon Ross
Chapter1: Combinatorial Analysis
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Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...
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Transcribed Image Text:The life expectancy of a fluorescent light bulb is given by the number of hours that it will burn. From the following frequency
distribution, find the sample standard deviation s (in h). (Use the mean value 2,193.5 h to calculate the sample standard
deviation rounded to the nearest whole number.)
Midpoint Frequency Product
f
Life of bulb
(hours)
xf
-0.5-499.5
249.5
3
748.5
499.5-999.5
749.5
11
8,244.5
999.5-1,499.5
1,249.5
14
17,493
1,499.5-1,999.5
1,749.5
17
29,741.5
1,999.5-2,499.5
2,249.5
28
62,986
2,499.5-2,999.5
2,749.5
33
90,733.5
2,999.5-3,499.5
3,249.5
14
45,493
3,499.5-3,999.5
3,749.5
18,747.5
S =
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