he fllowing chart shows the hourly wages ofasample of certif

he fllowing chart shows the hourly wages ofasample of certified welders 40 30 20 10 100 75 50 25 0 5 1015 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 $15 per hour? d. About 25% of the welders make less than what amount? (Round the final answer to 1 decimal place.) e. Ten of the welders studied made less than what amount? f. What percentage of the welders make less than $10 per hour?

Solution

1). 40 welders were studied.

2). Class interval is \"5\" for hourly wages.

3). About 50%, that is less than 20 workers earn less than $15 per hour

4). About 25% make less than $10 per hour

5). Ten of the welders studied made less than $10

6). 25% make less than $10 per hour