Question

33.57 26.54 38.34 31.44 26.86 27.78 25.21 29.01 36.42 54.33 24.54 30.49 24.49 41.50 29.07 41.75 29.39 47.09 44.68 42.10

Use these data to construct:

33.23 28.21 27.74 30.08 40.81 47.78 28.99 27.38 33.48

2

Lecturer: Dr. Kazhan I. Mahmood

a. b. c. d. e. f. g.

A frequency distribution

A cumulative frequency distribution

A relative frequency distribution

A cumulative relative frequency distribution

A histogram

What percentage of the measurements are less than 30?

What percentage of the measurements are between 40 and 49.99?

Answer 1

ANSWER:

a,b,c,d:

Class	Frequency	Cummulative Frequency	Relative Frequency	Cummulative Relative Frequency
20 - 24.99	2	2	6.9	6.9
25 - 29.99	11	13	37.9	44.8
30 - 34.99	6	21	20.7	65.5
35 - 39.99	2	21	6.9	72.4
40 - 44.99	5	26	17.2	89.6
45 - 49.99	2	28	6.9	96.5
50 - 54.99	1	29	3.5	100
Total	29		100

Histogram:

e)

What percentage of the measurements are less than 30?

Frequency below CL 30 or

Class	Frequency
20 - 24.99	2
25 - 29.99	11
Sum =	13
Percent =	45%

f)

What percentage of the measurements are between 40 and 49.99?

Class	Frequency
40 - 44.99	5
45 - 49.99	2
Sum =	7
Percent =	24%

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