IQuestion 2] In a survey, the total number of months certain brands of tyre took before going bad were noted and recorded in the following grouped frequency table: Number of months Number of Tyres gone 10 0-9 10-19 20-29 30-39 40-49 50-59 60-69 70-79 12 15 8 14 11 7 bad (frequency) a. Calculate the mean number of months it took for the tyres to go bad. b. Calculate variance from the above table. c. Calculate the standard deviation. d. Using the standard deviation, comment on the mean number of months it took the tyres to go bad.
IQuestion 2] In a survey, the total number of months certain brands of tyre took before going bad were noted and recorded in the following grouped frequency table: Number of months Number of Tyres gone 10 0-9 10-19 20-29 30-39 40-49 50-59 60-69 70-79 12 15 8 14 11 7 bad (frequency) a. Calculate the mean number of months it took for the tyres to go bad. b. Calculate variance from the above table. c. Calculate the standard deviation. d. Using the standard deviation, comment on the mean number of months it took the tyres to go bad.
Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
Problem 1RQ
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![IQuestion 2]
In a survey, the total number of months certain brands of tyre took before going bad were
noted and recorded in the following grouped frequency table:
0-9 10-19 | 20-29 | 30-39 | 40-49 50-59 | 60-69 70-79
Number of months
Number of Tyres gone 10
12
15
14
11
7
bad
(frequency)
a. Calculate the mean number of months it took for the tyres to go bad.
b. Calculate variance from the above table.
c. Calculate the standard deviation.
d. Using the standard deviation, comment on the mean number of months it took the tyres
to go bad.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fcc8b4e33-200f-4136-a5a9-8c4b487db8eb%2Fb456ca08-0795-4329-b3d7-9c422c0a895b%2Fqqlbjcn_processed.jpeg&w=3840&q=75)
Transcribed Image Text:IQuestion 2]
In a survey, the total number of months certain brands of tyre took before going bad were
noted and recorded in the following grouped frequency table:
0-9 10-19 | 20-29 | 30-39 | 40-49 50-59 | 60-69 70-79
Number of months
Number of Tyres gone 10
12
15
14
11
7
bad
(frequency)
a. Calculate the mean number of months it took for the tyres to go bad.
b. Calculate variance from the above table.
c. Calculate the standard deviation.
d. Using the standard deviation, comment on the mean number of months it took the tyres
to go bad.
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