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Author Question: An inventor has developed a new spray coating that is designed to improve the wear of bicycle tires. ... (Read 135 times)

stock

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on: Feb 14, 2020
An inventor has developed a new spray coating that is designed to improve the wear of bicycle tires. To test the new coating, the inventor randomly selects one of the two tires on each of 50 bicycles to be coated with the new spray. The bicycle is then driven for 100 miles and the amount of the depth of the tread left on the two bicycle tires is measured (in millimeters). It is desired to determine whether the new spray coating improves the wear of the bicycle tires. The data and summary information is shown below:



​

CoatedNon-Coated Difference

Mean 1.38 0.85 0.53

Std. Dev. 0.12 0.11 0.06

Sample Size 50 50 50


Use the summary data to construct a 90% confidence interval for the difference between the means.
◦ 0.53 ± 0.01396
◦ 0.53 ± 0.01663
◦ 0.53 ± 0.04512
◦ 0.53 ± 0.03787
Statistics ¦ McClave, Sincich, Tamarack ¦ 12th Edition
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Marked as best answer by stock on Feb 14, 2020

amynguyen1221

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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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stock

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

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Reply 3 on: Yesterday
Excellent

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