Test for single population mean.
Utilize a 0.05 significance level to test the claim that the mean life span of cell phones is equal to 5 years. The sample data are summarized by the statistics n=27, x=4.6 years, s- 1.9 years. See the display below.
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Test
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Value = 5
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95% Confidence Interval of the Difference
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t
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df
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Sig. 2(Tailed)
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Mean Difference
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lower
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upper
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Age
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-1.094
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26
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0.284
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-0.4
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************
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*****
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