A chemist for a pharmaceutical company wants to determine whether the mean reaction time for a newly developed antacid is less than 12 minutes.
 Open the sample data, AntacidReactionTime.MTW.
 Open the randomization test for 1sample mean dialog box.
 In Sample, enter Time.
 In Hypothesized mean, enter 12.
 Select Options.
 From Alternative hypothesis, select Mean < hypothesized value.
 Enter 1 in Base for random number generator.
Note
Using Base for random number generator ensures that your results match the example.
 Click OK.
Interpret the results
The alternative hypothesis states that the mean reaction time is less than 12 minutes. Because the pvalue is 0.203, which is greater than the significance level of 0.05, the chemist fails to reject the null hypothesis and cannot conclude that the mean reaction time is less than 12 minutes. The histogram shows that the bootstrap distribution appears to be normal, so the chemist can trust the results.

Time  16  11.3313  3.1149  9.7023  181.300  7.7000  10.0500  16.0000 


Null hypothesis  H₀: μ = 12  Alternative hypothesis  H₁: μ < 12 



