a. How many welders were studied? b. What is the class interval? c. About how many welders earn less than $10.00 per hour?

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
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Chapter10: Statistics
Section10.3: Measures Of Spread
Problem 21PFA
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19

19. The following cumulative frequency and the cumulative relative frequency polygon
for the distribution of hourly wages of a sample of certified welders in the Atlanta
Georgia, area is shown in the graph.
100
40 E
75
30
50
10
25
10
15
20
25
30
Hourly Wage $
a. How many welders were studied?
b. What is the class interval?
c. About how many welders earn less than $10.00 per hour?
d. About 75% of the welders make less than what amount?
e. Ten of the welders studied made less than what amount?
f. What percent of the welders make less than $20.00 per hour?
20. The cumulative frecuencua
Frequency
20
Percent
Transcribed Image Text:19. The following cumulative frequency and the cumulative relative frequency polygon for the distribution of hourly wages of a sample of certified welders in the Atlanta Georgia, area is shown in the graph. 100 40 E 75 30 50 10 25 10 15 20 25 30 Hourly Wage $ a. How many welders were studied? b. What is the class interval? c. About how many welders earn less than $10.00 per hour? d. About 75% of the welders make less than what amount? e. Ten of the welders studied made less than what amount? f. What percent of the welders make less than $20.00 per hour? 20. The cumulative frecuencua Frequency 20 Percent
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