Identify whether the quadratic model is useful for establishing the relationship between plant height and effect of manganese (Mn). Test by using necessary hypotheses.

Question

13) Use computer software to find the multiple regression equation. Can the equation be used for prediction? An anti-smoking group used data in the table to relate the carbon monoxide( CO) of various brands of cigarettes to their tar and nicotine (NIC) content. 13). CO TAR NIC 15 1.2 16 15 1.2 16 17 1.0 16 6. 0.8 1 0.1 1 8. 0.8 8. 10 0.8 10 17 1.0 16 15 1.2 15 11 0.7 9. 18 1.4 18 16 1.0 15 10 0.8 9. 0.5 18 1.1 16 A) CO = 1.37 + 5.50TAR – 1.38NIC; Yes, because the P-value is high. B) CÓ = 1.37 - 5.53TAR + 1.33NIC; Yes, because the R2 is high. C) CO = 1.25 + 1.55TAR – 5.79NIC; Yes, because the P-value is too low. D) CO = 1.3 + 5.5TAR - 1.3NIC; Yes, because the adjusted R2 is high. %3D

Answer 1

Question

Chapter 13, Problem 75SE

a.

To determine

Identify whether the quadratic model is useful for establishing the relationship between plant height and effect of manganese (Mn).

Test by using necessary hypotheses.

b.

To determine

Identify whether the quadratic predictor should be eliminated.

c.

To determine

Find the expected height when the manganese takes 10μM using the 90% confidence interval.

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