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Quiz 1
Quiz 1
1. The following frequency distribution analyzes the scores on a math test. Find the class boundaries of scores for the interval 76-82
| Scores | Number of Students |
| 40-59 | 2 |
| 60-75 | 5 |
| 76-82 | 8 |
| 83-94 | 12 |
|
95-99 |
6 |
2. The following frequency distribution analyzes the scores on a math test. Find the class boundaries of scores for the interval 95-99
| Scores | Number of Students |
| 40-59 | 2 |
| 60-75 | 5 |
| 76-82 | 8 |
| 83-94 | 12 |
|
95-99 |
6 |
3. The following frequency distribution analyzes the scores on a math test. Find the midpoint of scores for the interval 76-82
| Scores | Number of Students |
| 40-59 | 2 |
| 60-75 | 5 |
| 76-82 | 8 |
| 83-94 | 12 |
|
95-99 |
6 |
4. The following frequency distribution analyzes the scores on a math test. Find the class boundaries of scores interval
60-75
| Scores | Number of Students |
| 40-59 | 2 |
| 60-75 | 5 |
| 76-82 | 8 |
| 83-94 | 12 |
|
95-99 |
6 |
5. Construct the cumulative Frequency distribution that corresponds to the given frequency distribution.
| Speed | Number of cars |
| 0-29 | 5 |
| 30-59 | 12 |
| 60-89 | 55 |
| 90-119 | 18 |
6. Construct the relative Frequency distribution that corresponds to the given frequency distribution.
| Speed | Number of cars |
| 0-29 | 5 |
| 30-59 | 12 |
| 60-89 | 55 |
| 90-119 | 18 |
7. The frequency distribution for the weekly incomes of students with part-time jobs is given below. Construct the corresponding relative frequency distribution.
| Income ($) | Frequency |
| 200-300 | 50 |
| 301-400 | 75 |
| 401-500 | 71 |
| 501-600 | 65 |
| More than 600 | 15 |
8. The amount of time (in hours) Sam spent studying on each of the last 6 days is given below. Find the mean study time.
2, 6, 4, 3.5, 7,5, 8
9. Temperature in 7 different cities are shown. Find the median temperature.
25, 33, 33, 64, 71, 73, 81
10. Temperature in 6 different cities are shown. Find the median temperature.
25, 33, 33, 64, 71, 73
11. The test scores of 40 students are summarized in the frequency distribution below. Find the mean score. Show calculator function and inputs clearly to get credit.
| Scores | Frequency |
| 50-59 | 5 |
| 60-69 | 12 |
| 70-79 | 5 |
| 60-89 | 4 |
| 90-99 | 9 |
12. The test scores of 40 students are summarized in the frequency distribution below. Find the standard deviation of the score. Show calculator function and inputs clearly to get credit.
| Scores | Frequency |
| 50-59 | 5 |
| 60-69 | 12 |
| 70-79 | 5 |
| 60-89 | 4 |
| 90-99 | 9 |
13. Rich Borne teaches Chemistry. The scores on the first quiz are shown below. Find the range.
24 33 29 12 45 65 56 25 37
14. Rich Borne teaches Chemistry. The scores on the first quiz are shown below. Using the range rule of thumb estimate the standard deviation.
24 33 29 12 45 65 56 25 37
15. The systolic blood pressure is normally distributed with a mean of 120 mmHg and a standard deviation of 12mm. What percentage have blood pressure between 108m and 132 mm?
16. The systolic blood pressure is normally distributed with a mean of 120 mmHg and a standard deviation of 12mm. What percentage have blood pressure between 96 and 144 mm?
17. The systolic blood pressure is normally distributed with a mean of 120 mmHg and a standard deviation of 12mm. What percentage have blood pressure between 84 and 156 mm?
18. Scores on a test have a mean of 83 and standard deviation of 5. Michelle has a score of 68. Convert Michelle’s score to a z score.
19 Scores on a test have a mean of 83 and standard deviation of 5. Michelle has a score of 68. Convert Michelle’s score to a z score. Is this score unusual or usual?