GED Math : Mean
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Example Questions
Example Question #63 : Statistics
Use the following data set of test scores to answer the question:
Find the mean.
To find the mean (or average), we will use the following formula:
So, given the set
we can calculate the following:
We can also calculate the following:
because there are 7 numbers in the data set.
So, we can substitute. We get
Therefore, the mean of the data set is 86.
Example Question #64 : Statistics
A Science class took an exam. Here are the scores of 9 students:
Find the mean score.
To find the mean, we will use the following formula:
Now, given the set
We can calculate the following:
We can also calculate the following:
because if we count, we can see there are 9 numbers in the set.
So, we can substitute. We get
Therefore, the mean score is 84.
Example Question #11 : Mean
Determine the mean of the numbers:
The mean is the average of all the numbers in the data set.
Add all the numbers and divide the total by four.
Reduce the fraction.
The mean is:
Example Question #12 : Mean
Determine the mean of the numbers:
The mean is the average of all the numbers in the set of numbers.
Add the numbers and divide the quantity by four.
The mean is:
Example Question #13 : Mean
Determine the mean of the numbers:
The mean is the average of all the numbers in the data set.
Sum all the numbers and divide the quantity by 4.
The answer is:
Example Question #14 : Mean
There are nine people in an elevator. They have an average weight of 
To figure out this problem, you must first calculate the total pounds in the elevator.
The first group is:
The second group is:
Thus, the total amount is:
Thus, the average weight in the elevator will be:
This is 
Example Question #15 : Mean
Determine the mean:
Sum all the numbers and divide the quantity by 6.
Reduce this fraction.
The answer is:
Example Question #16 : Mean
Evaluate the mean:
The mean is the average of all the numbers in the data set.
Add all numbers and divide the total by five.
The answer is:
Example Question #17 : Mean
Find the mean of the numbers:
The mean is the average of all the numbers.
Add all the numbers and divide the sum by 6.
Reduce this fraction.
The answer is:
Example Question #18 : Mean
The grade a student earns for a course depends on the mean of the best four of the five tests he takes. The minimum mean score for each grade is as follows:
A: 90
B: 80
C: 70
D: 60
Charles earned 68, 50, 77, 73, and 80 on his five tests. What was his letter grade?
D
B
C
F
C
Charlie's lowest score was a 50, so his grade was the mean of 68, 77, 73, and 80, which is the sum of the scores divided by the number of scores, 4;
so Charlie made a grade of "C".
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