Question

Ages	Number of students
15-18	5
19-22	6
23-26	3
27-30	9
31-34	9
35-38	6

Find the relative frequency for the class with lower class limit 19

Relative Frequency = %

Give your answer as a percent, rounded to two decimal places

A Frequency Distribution Table using data
This list of 16 random numbers has been sorted:

22
29
34
34
35
40
43
50
50
50
51
53
54
55
56
56

Fill in this table with the frequencies as whole numbers and the relative frequencies as decimals with 4 decimal places for the relative frequencies. Remember: relative frequencies are between 0.0 and 1.0

(This problem does not accept fractions.)

Class	Frequency	Rel.Freq
20-29
30-39
40-49
50-59

Complete the table.

Ages	Number of students	Cumulative Frequency
15-18	3
19-22	3
23-26	4
27-30	2
31-34	8
35-38	2

In a student survey, fifty-two part-time students were asked how many courses they were taking this term. The (incomplete) results are shown below:

Please round your answer to 4 decimal places for the Relative Frequency if possible.

# of Courses	Frequency	Relative Frequency	Cumulative Frequency
1	18
2		0.3077	34
3	18	0.3462	52

What percent of students take exactly one courses? %

50 part-time students were asked how many courses they were taking this term. The (incomplete) results are shown below:

# of Courses	Frequency	Relative Frequency	Cumulative Frequency
1	13	0.26
2	24
3

a. Complete the table.

b. What percent of students take exactly two courses? %

70 adults with gum disease were asked the number of times per week they used to floss before their diagnoses. The (incomplete) results are shown below:

# of times floss per week	Frequency	Relative Frequency	Cumulative Frequency
0		0.1	7
1	10	0.1429	17
2	4	0.0571	21
3	9		30
4	11	0.1571
5	9	0.1286	50
6	13	0.1857	63
7	7	0.1	70

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

b. What is the cumulative relative frequency for flossing 1 time per week? %

Answer 1

Find the relative frequency for the class with lower class limit 19

Relative Frequency = 15.79 %

Relative frequency with 4 decimal places:

Cumulative Frequency:

In a student survey, fifty-two part-time students were asked how many courses they were taking this term. The (incomplete) results are shown below:

Please round your answer to 4 decimal places for the Relative Frequency if possible

What percent of students take exactly one courses? %

18 student took one course . total courses are 52 so 18/52 = 34.62%

50 part-time students were asked how many courses they were taking this term. The (incomplete) results are shown below:

What percent of students take exactly two courses?

48%

70 adults with gum disease were asked the number of times per week they used to floss before their diagnoses. The (incomplete) results are shown below:

b. What is the cumulative relative frequency for flossing 1 time per week? %

24%

Formula Reference: