We want to know the average number of hours financial advisors in your area work a...
We want to know the average number of hours financial advisors in your area work a month. You survey 76 random advisors and find the average hours they work per month is 189. You also believe that the population standard deviation is 20 hours a month. Give a 99% confidence interval for the estimated average number of hours financial advisors work per month.
|
Confidence Interval Estimate for the Mean |
|
|
Data |
|
|
Population Standard Deviation |
20 |
|
Sample Mean |
189 |
|
Sample Size |
76 |
|
Confidence Level |
99% |
|
Intermediate Calculations |
|
|
Standard Error of the Mean |
2.2942 |
|
Z Value |
-2.5758 |
|
Interval Half Width |
5.9094 |
|
Confidence Interval |
|
|
Interval Lower Limit |
183.09 |
|
Interval Upper Limit |
194.91 |
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We want to know the average number of
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