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Author Question: A marketing study was conducted to compare the mean age of male and female purchasers of a certain ... (Read 130 times)

laurencescou

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on: Feb 14, 2020
A marketing study was conducted to compare the mean age of male and female purchasers of a certain product. Random and independent samples were selected for both male and female purchasers of the product. It was desired to test to determine if the mean age of all female purchasers exceeds the mean age of all male purchasers. The sample data is shown here:

Female:   n = 10,    sample mean = 50.30,    sample standard deviation = 13.215
Male:       n = 10,    sample mean = 39.80,    sample standard deviation = 10.040

Which of the following assumptions must be true in order for the pooled test of hypothesis to be valid?
I.   Both the male and female populations of ages must possess approximately normal probability distributions.
II.  Both the male and female populations of ages must possess population variances that are equal.
III. Both samples of ages must have been randomly and independently selected from their respective populations.
◦ II only
◦ I only
◦ III only
◦ I, II, and III
Statistics ¦ McClave, Sincich, Tamarack ¦ 12th Edition
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Marked as best answer by laurencescou on Feb 14, 2020

ryrychapman11

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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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laurencescou

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Reply 2 on: Feb 14, 2020
YES! Correct, THANKS for helping me on my review

ghepp

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Reply 3 on: Yesterday
Wow, this really help

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