Question

Joyce asked 50 randomly-selected students at her school whether they have one or more brothers or sisters. The table shows the results of Joyce's poll.

Answer 1

To create a frequency table based on the number of siblings, count the number of students who have each possible number of siblings. Then, calculate the relative frequency and cumulative relative frequency. From there, you can determine the percentage of students with certain numbers of siblings.

Step-by-step explanation:

To create a frequency table based on the number of siblings, count the number of students who have each possible number of siblings. Then, calculate the relative frequency by dividing the frequency for each number of siblings by the total number of students. To find the cumulative relative frequency, add up the relative frequencies for each number of siblings up to that point.

1. To determine the percentage of students with no siblings, divide the frequency for no siblings by the total number of students and multiply by 100.
2. To determine the percentage of students with one to three siblings, sum the relative frequencies for the numbers of siblings between one and three, inclusive, and multiply by 100.
3. To determine the percentage of students with fewer than three siblings, sum the relative frequencies for the numbers of siblings less than three and multiply by 100.