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The following cumulative frequency polygon shows the hourly wages of

The following cumulative frequency polygon shows the hourly wages of a sample of certified welders in the Atlanta, Georgia, area.

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 perhour?

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 perhour?

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