Final answer:
To determine the average noise rating, calculate the mean of the frequency distribution by adding up all the noise ratings and dividing by the total number of locations tested.
Step-by-step explanation:
To determine the average noise rating, we need to calculate the mean of the frequency distribution. The average noise rating is the sum of all the noise ratings divided by the total number of locations tested. For example, if the noise ratings are given in decibels, we can add up all the decibel values and divide by the number of test locations.