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11 May, 03:54

1 / Assume that the distribution of residuals is approximately normal with mean 0 cm and standard deviation 5.9cm. What percent of the residuals are greater than 8cm? Justify your answer.

2 / Base on your answer on part 1, would it be surprising to randomly select a high school senior from the high school with a foot length of 20cm and a height greater than 165cm? Justify your answer. Download pdf

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  1. 11 May, 06:46
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    1. 8.576%

    2. Yes

    Step-by-step explanation:

    1. Use the calculator

    Enter: normalcdf (8, E99, 0, 5.9)

    This is equal to. 08756.

    Convert this number into a percent = 8.756%

    2.

    First, calculate the residual

    Residual = Observed - Predicted = 165 - 2.599 (20) + 105.08 = 7.94

    Use the calculator

    Enter: normalcdf (7.94, E99, 0, 5.9)

    This is equal to. 0892.

    Convert this number into a percent = 8.92%

    This would be surprising, because the chance of this happening is very low.
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