be sure to check out the rubric at the bottom of the page. this is how i will grade you. this is due Friday.
Question One: Guinea Pigs.
Here are the survival times in days of 72 Guinea Pigs that were injected with an infectious bacteria in a medical experiment.
pigs: 43 45 53 56 56 57 58 66 67 73 74 79 80 80 81 81 81 82 83 83 84 88 89 91 91 92 92 97 99 99 100 100 101 102 102 102 103 104 107 108 109 113 114 118 121 123 126 128 137 138 139 144 145 147 156 162 174 178 179 184 191 198 211 214 243 249 329 380 403 511 522 598
a) Summarize the data graphically and numerically.
[this is many steps--make sure you know what goes into this]
b) which method do you suggest for checking for outliers?
Explain why you chose the method that you did, and then run the check, showing necessary steps.
c) Did you find any points you believe are outliers? Make sure to defend your decision. In addition, if your test suggested that a point was an outlier and you do not believe it to be so, explain why.
d) If in part c you think the points should be removed to explain the data better, do so now. Re-summarize any of the data if necessary [graphically and numerically].
e) Why do you think that some of the guinea pigs survived so much long than the others? Come up with at least two possible hypotheses.
Question Two: Detroit Tigers On Base Percentage.
OBP (on base percentage) is how often a batter gets on base compared to the number of times the person is at the plate. an OBP of .500 means they get on base once for every two times to the plate. Here are the OBP of the everyday players of the Detroit Tigers in 2012:
obp=c(.393, .412, .296, .377, .305, .286, .352, .370, .330, .283, .283, .226, .337, .276, .330, .373)
a) Summarize the data graphically and numerically.
b) which method do you suggest for checking for outliers?
c) Did you find any points you believe are outliers? Make sure to defend your decision. In addition, if your test suggested that a point was an outlier and you do not believe it to be so, explain why.
d) If in part c you think the points should be removed to explain the data better, do so now. Re-summarize any of the data if necessary [graphically and numerically].
Question Three: Odors in a Restaurant
When you ask, I will hand you a piece of paper with three data sets on it. These represent the amount of money (in Euros) spent at a restaurant. Each experiment was on a different day, with a different odor used in the background.
a) Summarize the data graphically and numerically.
b) which method do you suggest for checking for outliers?
[in this case, make sure to use the same method for ALL THREE different data sets, as they closely relate to each other.]
c) Did you find any points you believe are outliers? Make sure to defend your decision. In addition, if your test suggested that a point was an outlier and you do not believe it to be so, explain why.
d) If in part c you think the points should be removed to explain the data better, do so now. Re-summarize any of the data if necessary [graphically and numerically].
e) Make a graphical representation of all the data in one graphic that shows the differences between the odors and Euros spent.
f) What recommendations would you make to the owner of the restaurant? Be sure to use proper language when describing the shapes of your graphs, using the mean, median and mode, and any other information you bring to the table (so to speak).
Question Four: Cholesterol.
The data for this question can be found in your book on page 70.
Write a brief analysis of this data, comparing the Smokers Data to the Ex-Smokers data. Make sure to check four outliers before you do this and remove any points you feel it necessary to remove. Follow the process and procedures that we know and comment on each piece of the data.