Answer :
Using the t-distribution, it is found that the p-value is of 0.177.
At the null hypothesis, it is tested that for a smartphone carrier's data speeds at airports, the mean is 19 Mbps, that is:
[tex]H_0: \mu = 19[/tex]
At the alternative hypothesis, it is tested if the mean is different than 19 Mbps, that is:
[tex]H_1: \mu \neq 19[/tex]
- We are testing if the mean is different from a value, hence it is a two-tailed test.
- The test statistic is t = 1.401.
- Sample size of n = 21, hence there are 21 - 1 = 20 df.
Inputting this information into a calculator, the p-value is of 0.177.
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