Using the Data to Perform a Hypothesis Test
This part will make use of the body data set created in ST3001. All computations must be done in Excel and provided in the final assessment document.
Be sure to provide an explanation for each of your answers and include supporting evidence from the text and/or Learning Resources.
Comparing BMI by smoking status
You are interested in determining if smokers have an Average BMI that is greater than nonsmokers.
Explain which hypothesis test would be appropriate for this situation (assume population variances are not known and sample variances are not equal).
Explain if this is a left-tailed, right-tailed or two-tailed test and justify your choice.
Complete a hypothesis test in Excel to test your claim. Be sure to include the results from the data analysis tool pack test.
Write a conclusion statement that makes use of Excel data to justify which hypothesis is supported and why.
State your findings in the context of the research question, “Do smokers have a BMI that is greater than nonsmokers?”
Comparing weight by region of the country
Patients were asked to report the region of the country they lived in. This data is coded as follows:
| 1=north |
| 2=south |
| 3=east |
| 4=west |
You are interested in determining if all four regions of the country have mean weights that are considered equal or if at least one is different.
Explain which hypothesis test would be appropriate for this situation.
Complete a hypothesis test in Excel to test your claim. Be sure to include the results from the data analysis tool pack test. Hint: Weight data will need to be sorted by region like the process previously used to sort BMI by smoking status.
Write a conclusion statement that makes use of Excel data to justify which hypothesis is supported and why.
State your findings in the context of the research question, “Do all four regions have equal average weights?”
Create an Excel box plot of all 4 four regions side by side (like in STAT3001) and paste it here. Add a chart title and legend. Write a sentence or two on how this graph justifies your answer in question 4. Remember, these charts show the 5-number summary.
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