SOLUTION: Please help me solve this the distribution of the number of erros 10 students made on a typing test is shown.
Errors Frequency
0-2 1
3-5 3
6-8 4
9-11
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-> SOLUTION: Please help me solve this the distribution of the number of erros 10 students made on a typing test is shown.
Errors Frequency
0-2 1
3-5 3
6-8 4
9-11
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Question 892769: Please help me solve this the distribution of the number of erros 10 students made on a typing test is shown.
Errors Frequency
0-2 1
3-5 3
6-8 4
9-11 1
12-14 1 Answer by stanbon(75887) (Show Source):
You can put this solution on YOUR website! Please help me solve this the distribution of the number of erros 10 students made on a typing test is shown.
Errors Frequency
0-2 1
3-5 3
6-8 4
9-11 1
12-14 1
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I'll work out the mean. You can work out the standard deviation.
Note:: Use the mark of each interval to represent the interval value.
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mean = (1*1 + 3*4 + 4*7 + 1*10 + 1*13)/(1+3+4+1+1)
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= (1 + 12 + 28 + 10 + 13)/(10)
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= 64/10
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= 6.4
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Note:: The answer you should get for the sample standard deviation is 3.41
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Cheers,
Stan H.
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