Math IA - 6.2 DHQ (1st) 12/4

Front

What is the formula to calculate the average of a set of numbers?

Back

Average = (Sum of all values) / (Number of values)

Front

If Paulo wants an average of 80 after four tests and has scores of 72, 80, and 82, what score does he need on the fourth test?

Back

He needs to score 86 on the fourth test.

Front

What happens to the average when a lower score is added to a set of higher scores?

Back

The average will decrease.

Front

If a class has an average grade of 87 and a student's score of 65 is added, what will happen to the new average?

Back

The new average will decrease.

Front

How do you find the lowest score needed to achieve a desired average?

Back

Set up the equation: (Sum of current scores + x) / (Number of tests + 1) = Desired average, then solve for x.

Front

If a student scores 90 and 84 on two quizzes, what is the minimum score needed on the third quiz to average 85?

Back

The student needs to score at least 81 on the third quiz.

Front

What is the mean of the following scores: 34%, 44%, 75%, 21%, 98%, 86%, 71%, 76%, 63%, 55%?

Back

The mean is 61.9%.

Front

How do you determine how many students scored above the mean in a set of scores?

Back

Count the number of scores that are greater than the calculated mean.

Front

What is the significance of the mean in a data set?

Back

The mean provides a measure of central tendency, indicating the average score.

Front

If a student scores 100 on a test, how does it affect the class average?

Back

It may increase the class average, depending on the other scores.