Assignment 4.1 Name: ______________
Date: _______________
Use the following exam grades to answer the set of questions 1-4:
56, 64, 72, 74, 84, 98, 80, 86, 74, 68, 51, 78, 75, 91, 63, 84, 79, 69, 76
- Arrange the data on a line plot.
- Arrange the data in a stem and leaf graph.
- Arrange the data in a frequency distribution using five intervals beginning with 50-59:
- Draw a histogram using the information in #3. Remember to label your axes. (Why is a histogram appropriate for this data?)
The letter grades for one section of MH 113 were as follows:
| Grade | Frequency |
| A | 2 |
| B | 8 |
| C | 10 |
| D | 4 |
| F | 1 |
- Draw a bar graph to represent this information. (Why is a bar graph appropriate with this data?)
- Draw a circle graph for this same information.
Public education expenditures in the United Sates, as a percentage of gross national product, are given in the following table:
| Year | Expenditure |
| 1960 | 4.7 |
| 1970 | 7.3 |
| 1980 | 6.5 |
| 1990 | 7.1 |
| 2000 | 7.3 |
| 2010 | 7.9 |
- Make a line graph representing the data. (Why is a line graph appropriate?)
A high school math teacher has students maintain records on their study time and then compares their average nightly study time to the scores received on an exam. A random sample of the students showed these comparisons:
| Study Time
(Nearest 5 min.) |
Exam Score |
| 15 | 58 |
| 25 | 72 |
| 50 | 85 |
| 20 | 75 |
| 25 | 68 |
| 30 | 88 |
| 40 | 80 |
| 15 | 74 |
| 25 | 78 |
| 30 | 70 |
| 45 | 94 |
| 35 | 75 |
- Make a scatterplot for the above information. Label the axes appropriately.
- Draw a line of best fit
- If a student studies 30 minutes, according to your line of best fit, what will his/her grade be?.
