statistics check

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Consider the following bivariate data.

Point A B C D E F G H I J
x 3 4 2 1 7 2 1 0 4 2
y 1 7 3 3 6 6 5 0 6 2


(b) Calculate the covariance. (Give your answer correct to two decimal places.)
5.35 was my answer .

(c) Calculate sx and sy. (Give your answers correct to three decimal places.)
sx = 26 was my answer.
sy = 39 was my answer .

(d) Calculate r using formula 13.2. (Give your answer correct to two decimal places.)
5.35 was my answer .

(e) Calculate r using formula 13.3. (Give your answer correct to two decimal places.)
190.5 .

  • statistics check -

    xi


    8


    10


    12


    6


    4

    yi


    2


    4


    6


    8


    10



    What is the estimated regression equation for x and y?
    y-hat = 10.8 - 0.6x
    y-hat = 11.6 - 0.6x
    y-hat = 10.8 + 0.6x
    y-hat = 11.6 + 0.6x

  • statistics check -

    y-hat = 10.8 - 0.6x

  • statistics check -

    y-hat = 11.6 + 0.6x

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