Homework SourseThe manager of a nightclub near a local university recorded
The manager of a nightclub near a local university recorded the ages of the last 100 guests in the following cumulative frequency distribution.
a. Construct the corresponding frequency, relative frequency, and cumulative relative frequency distributions. (Round \"relative frequency\" and \"cumulative relative frequency\" to 2 decimal places.)
b-1.How many of the guests were at least 26 but less than 30 years old?
Number of guests______?
b-2.What percent of the guests were at least 22 but less than 26 years old?
Percent of guests_____?
b-3.What percent of the guests were younger than 34 years old?
Percent of guests_____?
b-4.What percent were 34 years or older?
Percent of guests_____?
| Ages | Cumulative Frequency |
| 18 up to 22 | 69 |
| 22 up to 26 | 71 |
| 26 up to 30 | 83 |
| 30 up to 34 | 90 |
| 34 up to 38 | 100 |
Solution
a)
b-1.
According to the frequency column,
ANSWER: 12
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b-2.
According to the relative frequency column,
ANSWER: 2%
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b-3.
According to the cumulative relative frequency column,
ANSWER: 90%
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b-4.
According to the relative frequency column, those 34 to 38 years old are
ANSWER: 10%
| Ages | Frequency | Relative Frequency | Cumulative Relative Frequency |
| 18 up to 22 | 69 | 0.69 | 0.69 |
| 22 up to 26 | 2 | 0.02 | 0.71 |
| 26 up to 30 | 12 | 0.12 | 0.83 |
| 30 up to 34 | 7 | 0.07 | 0.9 |
| 34 up to 38 | 10 | 0.1 | 1 |
| Total | 100 | 1 | x |
