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MathematicsMathematics
28 April, 23:22

In 2016, the mean score on the AP Statistics exam was 2.80, with a standard deviation of 1.35. The mean score on the AP Calculus exam was a 2.86, with a standard deviation of 1.55. What is the combined mean and standard deviation for these exams?

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  1. 29 April, 02:59
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    Combined mean=5.66

    Combined standard deviation = 2.06

    Step-by-step explanation:

    Combined mean = (MXa + n*Xb) / (m+n)

    Combined mean = 2.80+2.86=5.66

    Combined mean = sqrt (1.55) ^2 + (1.35) ^2)

    Combined deviation = 2.06
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Home » Mathematics » In 2016, the mean score on the AP Statistics exam was 2.80, with a standard deviation of 1.35. The mean score on the AP Calculus exam was a 2.86, with a standard deviation of 1.55. What is the combined mean and standard deviation for these exams?
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