Intro to Data Analytics
Intro to Data Analytics/Business Data Mining
This homework will give you practice with performing a hypothesis test using given data. Download the data set “AirportServiceTimes.xlsx” , and perform a hypothesis test on the data. The data is a sample of service times at an airport ticketing counter. Determine if the airline can claim that its average service time is less than 150 seconds. Assume a level of significance of 0.05. In your submission, make sure you show all of your work and include the following steps as shown in class:
1. State the null hypothesis (H0) and alternative hypothesis (H1).
2. Calculate the t-statistic. You will have to first find the sample mean, sample standard deviation, and sample size.
3. Find the critical value. Use either Appendix A, Table A.2 on page 588 from the textbook or “t-table.pdf” posted in Lecture 8 under Course Documents.
4. Determine the decision rule, and the reject and fail to reject regions.
5. Determine your conclusion of whether you should reject or fail to reject H0.
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