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## Statistics

Estimate arithmetic mean, mode and average absolute deviation from the mean

 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. For the value 10,40,20,50 and 40, the value of the arithmetic mean is

a.32

b.40

c.30

d.34.5

2. For the data values, 20, 31,45,54,38,33,22,45, and 17, the mode is

a.33

b.34

c.38

d.45

3. The simplest measure of dispersion is the

a. Standard deviation

b. variance

c. Quartile deviation

d. range

4. The largest value in a set of data is 240, and the lowest value is 100. If the resulting frequency Distribution is to have seven classes of equal width, what will be the class width?

a.12

b.7

c.5

d.20

5. For the value 10,20,30,40 and 50, the average absolute deviation from the mean is

a.10

b.15

c.12

d.14

Statistics and Probability, Statistics

• Category:- Statistics and Probability
• Reference No.:- M918144

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