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Author Question: A random sample of 80 observations produced a mean = 35.4 and a standard deviation s = 3.1. a. Find ... (Read 87 times)

neverstopbelieb

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on: Feb 14, 2020

Question 1

A random sample of n = 144 measurements was selected from a population with unknown mean μ and standard deviation σ. Calculate a 90% confidence interval if = 3.55 and s = .49.

Question 2

A random sample of 80 observations produced a mean = 35.4 and a standard deviation s = 3.1.  
 
a. Find a 90% confidence interval for the population mean μ.
b. Find a 95% confidence interval for μ.
c. Find a 99% confidence interval for μ.
d. What happens to the width of a confidence interval as the value of the confidence coefficient is increased while the sample size is held fixed?
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Marked as best answer by neverstopbelieb on Feb 14, 2020

gasdhashg

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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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neverstopbelieb

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

upturnedfurball

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Reply 3 on: Yesterday
Excellent

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