Main Class Discussion

| December 9, 2017

Nonsmokers

4194
3522

3454

3062
3771
3783

3544
3746
4019

4248
3719
3668

3128
3290
3423

3471
4354
3544

3994
2976
4067

3732
3823
3302

3436
3976
3263

Smokers

3998
3455
3066

3150
2986
2918

4216
3502
3457

2860
3282
2746

3686
2851
3145

3807
3548
4104

3963
3892
2768

3769
3509
3629

4131
3129
4263

Is this an observational study or a designed experiment? Why?What is the explanatory variable? What is the response variable?Can you think of any lurking variables that may affect the results of the study?Go to .xuru.org/st/DS.asp”>http://www.xuru.org/st/DS.asp
and find the summary statistics for both non-smokers and smokers (mean,
median, standard deviation, quartiles.) Compute each group separately.
Report your findings.
Note: Copy the data from the tables and place in the large box on the page and separate each item by a comma.Why is the sample standard different from the population standard deviation? Which should you use in this study, and why?Using
your results, write up a practical summary of what you are seeing in
this data. Do you agree with the researchers’ conclusions based on your
analysis?

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