Can hair length be used to predict the height of a person? To try to answer...

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Can hair length be used to predict the height of a person? Totry to answer this, the following random subset of data werecollected from our classâ€™s data:
Hair length: Â Â Â Â Â 8Â Â Â Â Â Â Â 12Â Â Â Â Â Â Â 18Â Â Â Â Â Â Â 24Â Â Â Â Â Â Â 1Â Â Â Â Â Â Â 4Â Â Â Â Â Â Â Â Â 24Â Â Â Â Â Â Â 2Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â
Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â
Height:Â Â Â Â Â Â Â Â Â Â 68Â Â Â Â Â 60Â Â Â Â Â Â Â 61Â Â Â Â Â Â Â 67Â Â Â Â Â Â Â 67Â Â Â Â Â Â Â 70Â Â Â Â Â Â Â 68Â Â Â Â Â Â Â 70
Is there a significant correlation between hair length andheight? Use Î±=.05.
Calculate the coefficient of determination. What does thisvalue say about the relationship between hair length andheight?
What would you expect the height to be of a person with 4inches of hair?
Create a 90% prediction interval for the height of a personwith 4 inches of hair.

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3.7 Ratings (381 Votes)

X Hair lengthY HeightX 93 Y 531 X Y 6089 X2 1705 Y2 35347Sxx Xi X 2 623875Syy Yi Y 2 101875Sxy Xi X Yi Y 83875r 03327To Test H0 0H1 0Test Statistic t r n 2 See Answer

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