Exam 21: Percent of Error and Averages

____________________ are found by adding the sum of the units and then dividing by the number of units.

Six batteries are tested with the following readings: 12.73 volts, 12.23 volts, 12.9 volts, 12.48 volts, 12.29 volts, and 12.16 volts. What is the average reading?

On a trip the miles traveled are: Monday, 234 miles; Tuesday, 237 miles; Wednesday, 834 miles; Thursday, 398 miles. What is the average number of miles traveled per day?

The amount of error allowed in the size of structural steel is 1/10 of 1%. If an I beam is 7.2 inches deep, what, in inches, is the amount of error allowed?

A thermometer registered 85 degrees F, but the actual temperature was 90 degrees F. The percent error to the nearest tenth is ____________________%

On a test, the marks for ten students are: 2 students, 95%; 4 students, 88%; 3 students, 70%; and 1 student, 81%. What is the average mark on the test?

The speedometer of a car shows 37 mph. The actual speed is 43 mph. What is the percent of error to the nearest tenth?

On one tank of gasoline, a car gets 25.3 mpg. The next day it gets 23.4 mpg, and the following day 22.7 mpg. What is the average for the three days?

____________________ is the difference between what something does and what it should do.

Three mechanics in a shop receive $10.55 per hour, $9.15 per hour, and $10.70 per hour. What is the average hourly pay? Round to the nearest cent.