Project 1
How much does a student spend on snacks during school days? Any way you slice it, you still are paying for your snack.

1. You are to gather data from 20 males and 20 females today and record the data below. Now remember this is not a scientific study, so you can take their word for what they spent for snacks. Record the data and indicate if the snack was purchased on or off campus.
Student Female Amount Male Amount
count on/off won (krw) on/off Won (krw)
1 off 3,000 off 2,800
2 off 2,000 off 2,800
3 off 2,000 off 2,500
4 off 1,500 off 2,500
5 off 5,000 off 3,000
6 off 5,000 off 3,000
7 off 2,500 on 10,000
8 off 2,800 off 3,000
9 off 2,000 on 2,000
10 off 2,000 on 2,000
11 off 3,000 off 3,000
12 off 3,000 off 3,000
13 off 3,000 off 1,500
14 off 3,000 off 1,500
15 on 1,500 off 3,000
16 on 2,000 off 1,000
17 off 1,500 off 1,500
18 on 2,000 on 2,000
19 on 2,000 on 2,000
20 off 1,500 off 5,000
2. Make a stemplot of the 40 values in the space below:
3. Are there any outliers in the data set? If so, list them and give a reason to either eliminate them or keep them in the data set.
4. Find the five-number summary of the costs from the above data.
Low = _ Q1 = Median = Q3 = High = ___
5. Now let’s look at the data as different sets. Make a back-to-back stemplot of the data by gender in the space below.
Female Male
6. Make side-by-side boxplots of the Female and Male data sets in the space below.
7. . How do the two distributions compare? Who spends more for snacks?
8. Now look at the data of the costs spent for snacks On / Off campus. Make a back-to-back stemplot of the data in the space below.
On Campus Off Campus
9. Make side-by-side boxplots of the above data sets in the space below.
10. How do the two distributions compare? Where does the snacks cost more?
11. By looking at the stemplots and boxplots you have displayed in this project, which display gives you the clearer picture for the comparisons and why?

Sample Solution