1. Data set: Exam scores for all students in a statistics class
47	63	72	73	75	75	78	82	82	83	85	85	89	89	90	92	92	94	96	98
If we make a histogram, please identify the total number of classes. 
a. 3
b. 4 
c. 5 
d. 6

2. What is the total number of counts in the first class given that the class length is 10?
a. 1
b. 2
c. 3
d. 4

3. What is total number of counts in the third class given that the class length is 10?
a. 1
b. 2
c. 3
d. 4

4. For the following stem-and-leaf plot, 12 | 8=128
12|8999
13|558888899
14|12345678889
15|0067
16|459
17|13
18|08
19|6
20|3  
What is the shape of the distribution?
a. Skewed to the left
b. Skewed to the right
c. symmetric
d. other

5. What is the minimum value of the data set?
a. 12
b. 13
c. 128
d. 203

6. What are the properties of the data set?
a. the values are concentrated in the upper part of the graph, fewer values are small values.
b. the values are concentrated in the lower part of the graph, fewer values are small values.
c. the values are concentrated in the upper part of the graph, fewer values are big values.
d. the values are concentrated in the lower part of the graph, fewer values are big values.

7. In 2011, Oakwoods Jeep Dealership sold 100 cars, among them 35 are Grand Cherokee, 15 are 
Wangler, 30 are Liberty, and 20 are Commander. What is the relative frequency of Liberty?
a. 30
b. 35
c. 0.30
d. 0.35

8. If you want to use a chart to display the relative frequency of each model, which of the following you CANNOT use?
a. Bar chart for qualitative data
b. Histogram
c. Pareto chart
d. Pie chart 

9. Which of the following graph is used for studying the relationship between two variables?
a. Bar chart for qualitative data
b. Histogram
c. Pareto chart
d. Pie chart 
e. Scatter plot

10. In stem-and-leaf display (or plot), which is stem and which is leaf?
a. all digits except the last one is leaf, the last digit is stem
b. all digits except the last one is stem, the last digit is leaf
c. all digits except the first one is leaf, the first digit is stem
d. all digits except the first one is stem, the first digit is leaf

11. Which of the following graph enables you to retrieve the original data?
a. Histogram
b. Stem-and-Leaf plot
c. Pie chart 
d. Scatter plot