Mathematics
Grade10
Easy
Question
Answer the following with the help of the data given below:
There are two brands of light bulbs which are brand M and Brand J. Here are the life spans of both brands (in hrs):
Brand M : 100 , 200 , 150 ,120 , 140 , 100
Brand J : 120 , 180 , 190 , 140 , 130 , 110
Which of the brands have a high standard deviation?
- Brand J
- Brand M
- Both a and b
- None of the above
The correct answer is: Brand M
The mean for Brand M=135
The standard deviation for Brand M=
The mean for Brand J=145
The standard deviation for Brand J=
Brand M have high standard deviation.
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There are two brands of light bulbs which are brand M and Brand J. Here are the life spans of both brands (in hrs):
Brand M : 100 , 200 , 150 ,120 , 140 , 100
Brand J : 120 , 180 , 190 , 140 , 130 , 110
Which of the brands have a high average life span?
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Brand M : 100 , 200 , 150 ,120 , 140 , 100
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Brand M : 100 , 200 , 150 ,120 , 140 , 100
Brand J : 120 , 180 , 190 , 140 , 130 , 110
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20, 25, 15, 35, 40, 55, 50, 0
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