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24 August, 11:20

The data show the chest size and weight of several bears. Find the regression equation, letting chest size be the independent (x) variable. Then find the best predicted weight of a bear with a chest size of 50 inches. Is the result close to the actual weight of 407 pounds? Use a significance level of 0.05.

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  1. 24 August, 12:30
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    Kindly go through the explanation for the answer.

    Step-by-step explanation:

    From the above calculated value we get the value are as:

    n 6

    sum (XY) 137925.00

    sum (X) 278.00

    sum (Y) 2954.00

    sum (X^2) 12974.00

    sum (Y^2) 1467334.00

    b 11.3179

    a - 32.0607

    Formula for regression equation are as:

    y = - 32.1 + 11.3x

    when actual weight = 50

    y = - 32.1 + 11.3 X 50

    = 532.9

    The difference between the result and the 407 is 532.9 - 407 = 125.9, hence the result is very much different.
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