Question

170 people are asked how many siblings they have?

# of Siblings	Frequency	Relative Frequency	Cumulative Frequency
0	37	0.2176	37
1	25	0.1471
2		0.2	96
3	31		127
4	43	0.2529	170

a. Complete the table (Use 4 decimal places when applicable)

b. What percent of the people have exactly four siblings? %

Hint: Frequency Tables

Answer 1

Answer a)

Following is the completed table:

Explanation:

Relative Frequency = Frequency/Total Participants

So we can calculate frequency for 1 sibling as follows:

0.2 = Frequency/170

Frequency = 170*0.2 = 34

So we can calculate relative frequency for 3 siblings as follows:

Relative Frequency = 31/170 = 0.1824

Cumulative Frequency for 1 sibling = Frequency for 0 sibling + Frequency for 1 sibling

Cumulative Frequency for 1 sibling = 37+25 = 62

Answer b)

Out of 170 people, 43 people have 4 siblings.

Percentage of people have exactly four siblings = (43/170)*100 = 25.29%