Two-Sample t-Test and Confidence Interval The following data show the results of two random samples that measured the average number of minutes per charge for AA Lithium-ion (Li-ion) rechargeable batteries versus Nickel-Metal Hydride (NiMH) rechargeable batteries. Li-ion NiMH 109 85 97 90 89 88 86 87 91 87 100 86 97 85 87 89 86 90 98 84 99 86 102 88 88 90 104 88 89 96 80 Use the Excel Two Means Calculator in the course to obtain the margin of error to compute a 97% confidence interval for difference in true average number of minutes per charge between Li-ion and NiMH batteries. Using the result, fill in the blanks of the following statements rounded properly to 2 decimal places. Show your calculation of Lower and Upper limits on the Excel file to get full points. The lower limit of 97% confidence interval for difference in true average number of minutes per charge is_____________ The upper limit of 97% confidence interval for difference in true average number of minutes per charge is___________
Two-Sample t-Test and Confidence Interval
The following data show the results of two random samples that measured the average number of minutes per charge for AA Lithium-ion (Li-ion) rechargeable batteries versus Nickel-Metal Hydride (NiMH) rechargeable batteries.
| Li-ion | NiMH |
|---|---|
| 109 | 85 |
| 97 | 90 |
| 89 | 88 |
| 86 | 87 |
| 91 | 87 |
| 100 | 86 |
| 97 | 85 |
| 87 | 89 |
| 86 | 90 |
| 98 | 84 |
| 99 | 86 |
| 102 | 88 |
| 88 | 90 |
| 104 | 88 |
| 89 | |
| 96 | |
| 80 |
Use the Excel Two Means Calculator in the course to obtain the margin of error to compute a 97% confidence interval for difference in true average number of minutes per charge between Li-ion and NiMH batteries.
Using the result, fill in the blanks of the following statements rounded properly to 2 decimal places.
Show your calculation of Lower and Upper limits on the Excel file to get full points.
The lower limit of 97% confidence interval for difference in true average number of minutes per charge is_____________
The upper limit of 97% confidence interval for difference in true average number of minutes per charge is___________
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