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John s parents recorded his height at various ages up to 66 months Below is...

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John s parents recorded his height at various ages up to 66 months Below is a record of the results 48 Age months 36 54 60 66 38 41 45 Height inches 35 43 John s parents decide to use the least squares regression line of John s height on age to predict his height at age 21 years 252 months We conclude th such a prediction could be misleading because it involves extrapolation All of the answer options are correct John s height in inches should be about half his age in months John s parents will get a fairly accurate estimate of his height at age 21 years because the data are clearly correlated

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