Researchers studied the role that the age of workers has in determining the hours per month...
Researchers studied the role that the age of workers has in determining the hours per month spent on personal tasks. A sample of 1,686 adults were observed for one month. The data follow.
| AGE GROUP | |||
| 18-24 | 25-44 | 45-64 | |
| Mean | 4.17 | 4.04 | 4.31 |
| Std Dev | 0.75 | 0.81 | 0.82 |
| N | 241 | 768 | 677 |
Construct a 93 percent confidence interval for the mean hours spent
on personal tasks for 45- to 64-year-olds.
|
[4.27, 4.35] |
||
|
[4.26, 4.36] |
||
|
[4.28, 4.34] |
||
|
[4.25, 4.37] |
||
|
[2.83, 5.79] |
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Researchers studied the role that the age of workers has in
determining the hours per month...
Researchers have studied the role that the age or workers has in determining the hours per...
Researchers have studied the role that the age or workers has in determining the hours per month spent on personal tasks. A sample of 1,686 adults were observed for one month. The data are: Age Group 18-24 25-44 45-64 Mean 4.17 4.04 4.31 Std Dev 0.75 0.81 0.82 N 241 768 677 Construct a 95 percent confidence interval for the mean hours spent on personal tasks for 45-64 year olds.
1. Two manufacturing processes are being compared to try to reduce the number of defective products...
1. Two manufacturing processes are being compared to try to reduce the number of defective products made. During 8 shifts for each process, the following results were observed: Line A Line B n 181 | 187 Based on a 5% significance level, did line B have a larger average than line A? *Use the tables I gave you in the handouts for the critical values *Use the appropriate test statistic value, NOT the p-value method *Use and show the 5...
1. Two manufacturing processes are being compared to try to reduce the number of defective products made. During 8 shifts for each process, the following results were observed: Line A Line B n 181 | 187 Based on a 5% significance level, did line B have a larger average than line A? *Use the tables I gave you in the handouts for the critical values *Use the appropriate test statistic value, NOT the p-value method *Use and show the 5...
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