Battery life between charges for the two applications

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Reference no: EM133081881

Battery life is an important issue for many smartphone owners. Public health studies have examined "low-battery anxiety" and acute anxiety called nomophobia that results when a smartphone user's phone battery charge runs low and then dies.† Suppose battery life between charges for a particular smartphone averages 31 hours when the primary use is talk time and 10 hours when the primary use is Internet applications. Because the mean hours for talk time usage is greater than the mean hours for Internet usage, the question was raised as to whether the variance in hours of usage is also greater when the primary use is talk time. Sample data showing battery life between charges for the two applications follows.

35.8

22.2

24.0

32.6

18.5

43.5

28.0

23.8

30.0

22.8

19.3

35.5

14.0

13.5

16.4

11.9

9.9

3.1

6.4

11.0

15.2

4.0

4.7

 

Talking is population 1 Internet is population 2

Reference no: EM133081881

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