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Author Question: Two cosmetics manufacturers produce similar hairspray products. Manufacturer 1 asserts that its ... (Read 48 times)

xjustxicex

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on: Feb 26, 2023
Two cosmetics manufacturers produce similar hairspray products. Manufacturer 1 asserts that its hairspray holds longer, on average, than does its competitor’s product. To test the claim, we randomly sample 20 hairspray users and have half of them use brand 1 hairspray while the other half use brand 2. The average hold time for brand 1 is 18.5 hr with a standard deviation of 6.28 hr. The average hold time for brand 2 is 17.95 hr with a standard deviation of 8.55 hr. Does the sample support manufacturer 1’s assertion? Assume that the populations in question are both normal and have unequal variances. Select the appropriate critical value (CV), test statistic (TS), decision and conclusion. (Useα= 0.10).

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CV = 1.3368; TS = 0.16; rejectH0; Conclusion: There exists a statistically significant difference in hold.


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CV = 1.3304; TS = –0.23; fail to rejectH0; Conclusion: There is no statistically significant difference in hold.


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CV = –2.5835; TS = 0.23; rejectH0; Conclusion: There exists a statistically significant difference in hold.


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CV = 1.3368; TS = 0.16; fail to rejectH0; Conclusion: There is no statistically significant difference in hold.

Introductory Statistics: A Problem-Solving Approach ¦ Kokoska ¦ 3rd Edition
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Marked as best answer by xjustxicex on Feb 26, 2023

aublw

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Reply #1 on: Feb 26, 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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xjustxicex

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Reply 2 on: Feb 26, 2023
Thanks for the timely response, appreciate it

dyrone

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Reply 3 on: Yesterday
Excellent

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