Please complete the following lab using Mintitab, and submit it to Moodle.
Part 1: Starbucks
Some of Ms. Halliday’s students collected a representative sample of data at two Starbucks locations in Cranberry Township. The data are posted on the website under Starbucks Data. Each time slot shows the number of women and the total number of people in Starbucks during that visit. Use the data to answer the following questions. Type or paste your responses to this document, and submit only this document through Moodle. Use Minitab to summarize all of your data.
1. How many total women were observed in the study?
2. How many total men were observed in the study?
3. How many total people were observed in the study?
4. What proportion of Starbucks customers were women in the study?
5. What proportion of Starbucks customers were men customers in the study?
6. Our question we are studying is: “Are Starbucks customers more likely to be female?” Construct a 95% confidence interval to estimate the true proportion of Cranberry Twp. Starbucks customers who are women.
- What type of inference test will you use? State the name of the test.
- Check your conditions. Use the equation editor to show specific symbols. [Go to the INSERT tab à Equation (with the Pi symbol)]
- If the conditions have been met, proceed with the inference test. Open up MINITAB. Go to STAT à Basic Statistics à1 Proportion. Click on the radio button next to “Summarized Data.” Type in your ‘n’ and ‘x’ values. Next, click on “Options.” Define your confidence level. Put ‘0.5’ in for your test proportion. Next, define your alternative as “not equal.” Lastly, check the box next to “use test and interval based on normal distribution.” Copy and paste your results below (you may also paste a screenshot).
- What does this interval mean? Write a sentence or two explaining the interval of percentages in context.
- Does this answer the question, “Are Starbucks customers more likely to be female?”