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Relative frequency distribution and cumulative frequency distribution

Annual Income

Number of Households

Under $10,000

20

$10,000-under $20,000

45

$20,000-under $30,000

70

$30,000-under $40,000

30

$40,000-under $50,000

15

$50,000-under $60,000

12

$60,000-under $70,000

8

Total

200

1. What is the frequency of the $20,000 -under $30,000 class?

a.20

b.45

c.75

d.30

2. What is the width of each class?

a. $20,000

b. $5,000

c. $60,000

d. $10,000

3. What is the midpoint for the $40,000 - under $50,000 class?

a. $45,000

b. $40,000

c.$42,000

d. 15

4. If we were to convert these data a relative frequency distribution, what value would be linked with the $50,000 - under $60,000 class?

a. 0.96

b.0.06

c. 0.04

d.0.12

5. For a cumulative frequency distribution (less than or within), what value would be linked with the $30,000 - under $40,000 class?

a.30

b.35

c.165

Statistics and Probability, Statistics

  • Category:- Statistics and Probability
  • Reference No.:- M918146

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