SOLUTION: The data below represents the score on an Algebra test. Determine the population mean score and standard deviation.
Score Number of students
50-59 2
60-69 3
70-79
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-> SOLUTION: The data below represents the score on an Algebra test. Determine the population mean score and standard deviation.
Score Number of students
50-59 2
60-69 3
70-79
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Question 986658: The data below represents the score on an Algebra test. Determine the population mean score and standard deviation.
Score Number of students
50-59 2
60-69 3
70-79 7
80-89 10
90-99 8 Answer by stanbon(75887) (Show Source):
You can put this solution on YOUR website! The data below represents the score on an Algebra test. Determine the population mean score and standard deviation.
Score Number of students
50-59 2 ::: Mark is 54.5::: sum = 2*54.5 = 109
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60-69 3 ::: Mark is 64.5::: sum = 3*64.5 = 193.5
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70-79 7 ::: Mark is 74.5::: sum = 7*74.5 = 521.5
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80-89 10::: Mark is 84.5 ::: sum = 10*84.5 = 845
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90-99 8 ::: Mark is 94.5 ::: sum = 8*94.5 = 756
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Mean = (sum of the sums)/(sum of the frequencies) 80.83
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Using the mean you can figure out the standard deviation.
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Cheers,
Stan H.
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