Understanding Mean Calculation

The video tutorial explains how to calculate the mean of a data set, specifically test scores. It begins by defining the mean as the average, then demonstrates how to sum the test scores and divide by the number of scores to find the mean. The tutorial includes a step-by-step calculation of the sum and division, resulting in a mean score of 84. Finally, it interprets the mean score in the context of a grading scale, indicating that an average score of 84 would typically be a B grade.

What is another term used for the mean of a data set?

• Median

• Mode

• Range

• Average

How many test scores are considered in the example?

• 6

• 3

• 4

• 5

What is the sum of the test scores 84, 72, 91, 95, and 78?

• 460

• 400

• 420

• 440

How do you determine the mean once you have the sum of the scores?

• Multiply by the number of scores

• Divide by the number of scores

• Subtract the smallest score

• Add the largest score

What is the mean of the test scores in the example?

• 85

• 82

• 83

• 84

What is the remainder when dividing 420 by 5 to find the mean?

• 2

• 1

• 3

• 0

If the mean score is 84, what letter grade does it correspond to on most grading scales?

• D

• C

• B

• A