A chemist for a pharmaceutical company wants to determine the reaction time for a newly developed antacid.

- Open the sample data, AntacidReactionTime.MTW.
- Choose .
- In Statistic, select Mean.
- In Sample, enter Time.
- Click Options. Enter
`1`in Base for random number generator.###### Note

Using Base for random number generator ensures that your results match the example.

- Click OK in each dialog box.

The 95% CI indicates that the chemist can be 95% confident that the population mean of the reaction time is between approximately 9.9 minutes and 12.9 minutes. The histogram shows that the bootstrap distribution appears to be normal, so the chemist can trust the results.

Observed Sample
Variable N Mean StDev Variance Sum Minimum Median Maximum
Time 16 11.331 3.115 9.702 181.300 7.700 10.050 16.000

Bootstrap Samples for Mean
Number of
Resamples Mean StDev 95% CI for μ
1000 11.3095 0.7625 (9.8562, 12.8562)