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Author Question: A producer of various kinds of batteries has been producing "D" size batteries with a life ... (Read 72 times)

madimontg

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on: Mar 25, 2023

A producer of various kinds of batteries has been producing "D" size batteries with a life expectancy of 87 hours.  Due to an improved production process, management believes that there has been an increase in the life expectancy of their "D" size batteries.  A sample of 36 batteries showed an average life of 88.5 hours.  Assume from past information that it is known that the standard deviation of the population is 9 hours.

a.

Give the null and the alternative hypotheses.

b.

Compute the test statistic.

c.

At 99% confidence using the critical value approach, test management's belief.

d.

What is the p-value associated with the sample results?  What is your conclusion based on the p-value?

Essentials of Statistics for Business and Economics ¦ Anderson, Sweeney, Williams, Camm, Cochran ¦ 7th Edition
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Marked as best answer by madimontg on Mar 25, 2023

jojo120419

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Reply #1 on: Mar 25, 2023
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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madimontg

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Reply 2 on: Mar 25, 2023
YES! Correct, THANKS for helping me on my review

tkempin

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Reply 3 on: Yesterday
Excellent

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