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Author Question: A collector of grandfather clocks believes that the price received for the clocks at an auction ... (Read 83 times)

wenmo

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on: Feb 14, 2020
A collector of grandfather clocks believes that the price received for the clocks at an auction increases with the number of bidders, but at an increasing (rather than a constant) rate. Thus, the model proposed to best explain auction price (y, in dollars) by number of bidders (x) is the quadratic model

E(y) = β0 + β1x + β2x2


This model was fit to data collected for a sample of 32 clocks sold at auction.

Suppose the p-value for the test of H0: β2 = 0 vs. Ha: β2 > 0 is .02. What is the proper conclusion?
◦ There is evidence (at α = .05) of downward curvature in the relationship between auction price (y) and number of bidders (x).
◦ There is evidence (at α = .05) of upward curvature in the relationship between auction price (y) and number of bidders (x).
◦ Reject H0 at α = .05; the model is not useful for predicting auction price (y).
◦ There is no evidence (at α = .05) of upward curvature in the relationship between auction price (y) and number of bidders (x).
Statistics ¦ McClave, Sincich, Tamarack ¦ 12th Edition
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Marked as best answer by wenmo on Feb 14, 2020

babybsemail

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Reply #1 on: Feb 14, 2020
Lorsum iprem. Lorsus sur ipci. Lorsem sur iprem. Lorsum sur ipdi, lorsem sur ipci. Lorsum sur iprium, valum sur ipci et, vala sur ipci. Lorsem sur ipci, lorsa sur iprem. Valus sur ipdi. Lorsus sur iprium nunc, valem sur iprium. Valem sur ipdi. Lorsa sur iprium. Lorsum sur iprium. Valem sur ipdi. Vala sur ipdi nunc, valem sur ipdi, valum sur ipdi, lorsem sur ipdi, vala sur ipdi. Valem sur iprem nunc, lorsa sur iprium. Valum sur ipdi et, lorsus sur ipci. Valem sur iprem. Valem sur ipci. Lorsa sur iprium. Lorsem sur ipci, valus sur iprem. Lorsem sur iprem nunc, valus sur iprium.
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wenmo

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Reply 2 on: Feb 14, 2020
Wow, this really help

carojassy25

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Reply 3 on: Yesterday
Gracias!

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