Question
A manufacturer ofbatterieswanted to test the longevity of one-time-use and rechargeable batteries. Employees who work inthe research and developmentdepartmentcreated10 different pairs of battery, making one
A manufacturer ofbatterieswanted to test the longevity of one-time-use and rechargeable batteries. Employees who work inthe research and developmentdepartmentcreated10
different pairs of battery, making one of each type. Then they put the batteriesunder a performance test and measured the time it took for them to fail. Assume that the populations are normally distributed.
The manufacturer tests the paired data, where=0.05
, in order to evaluate theclaim that the true meandifference in times until failure between one-time-use and rechargeable batteriesis not equal to zero.
For this test:H
0
:
d
=0
,H
a
:
d
0
, which is a two-tailed test.
The test results are:t1.87
,p-value is approximately0.094
Which of the following are appropriate conclusions for this hypothesis test?Select all that apply.
Select all that apply:
- There is not sufficient evidence at the=0.05
- level of significance to conclude thatthe true meandifference in times until failure between one-time-use and rechargeable batteries is not equal to zero.
- There is sufficient evidence at the=0.05
- level of significance to conclude thatthe true meandifference in times until failure between one-time-use and rechargeable batteries is not equal to zero.
- Reject the null hypothesis that the true meandifference in times until failure between one-time-use and rechargeable batteries is equal to zero.
- Fail to reject the null hypothesis that the true meandifference in times until failure between one-time-use and rechargeable batteriesis equal to zero.
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