The numbers of hours worked (per week) by 400 statistics students are shown below. Number of hoursFrequency 0 - 9 20 10 - 19 80 20 - 29200 30 - 39100 The percentage of students working 19 hours or less isGroup of answer choices
Question
The numbers of hours worked (per week) by 400 statistics students are shown below. Number of hoursFrequency 0 - 9 20 10 - 19 80 20 - 29200 30 - 39100 The percentage of students working 19 hours or less isGroup of answer choices
Solution
To find the percentage of students working 19 hours or less, you need to add up the frequencies for the groups that fall within this range.
From the data given, the groups that fall within this range are:
- 0 - 9 hours: 20 students
- 10 - 19 hours: 80 students
So, add these frequencies together: 20 + 80 = 100 students
This means that 100 students work 19 hours or less.
To find the percentage of these students out of the total, you divide the number of students working 19 hours or less by the total number of students, and then multiply by 100.
The total number of students is 400.
So, the calculation is: (100 / 400) * 100 = 25%
Therefore, 25% of students work 19 hours or less.
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