Algebra II : Data Properties
Study concepts, example questions & explanations for Algebra II
All Algebra II Resources
Example Questions
Example Question #15 : Mean
Angela scored the following on her past tests.
What is the current average (mean) score of her exams?
To find the average, add up all of the scores, then divide by how many scores there were:
Example Question #112 : Data Properties
The average score on a test that Sarah was absent for was 
Set 
Now set up an equation to solve for Sarah's test score:
Example Question #112 : Data Properties
In the Olympics gymnastics time trials, Sally's scores were 
Sally will make the team if she earns a
Sally will make the team if she earns a
Sally will not make the team.
Sally will only make the team if she makes a perfect ten.
Sally will make the team if she earns a
Sally will not make the team.
In order to determine whether Sally will qualify for the last time trial, set up an equation to find the mean. Out of the five scores, one of the scores is unknown, and Sally's final score must be 
Write the equation to solve for the mean.
Unfortunately, Sally cannot make the gymnastics team because she needs to earn a 10.8, which is not possible on the score limit.
The correct answer is:
Example Question #13 : Mean
Find the mean of the following set of numbers: 
The mean is also the average of a set of numbers. To find the mean, add all of the numbers in the set: 
In this case, the sum of all the numbers is 
This will give you an average or mean of 
Example Question #114 : Data Properties
The average of the class on the most recent exam was an 84.1. The 2 lowest scores of the class were 71 and 73. If the teacher decides to removed the 2 lowest scores from the class average and there are 10 students in the class, what is the new class average?
To get the total combined score of everyone in the class, multiply the average of the class by the number of students.
Now the new total is 697. To find the new average, divide this new total by the new number of grades to be averaged in, which is 8. Remember that the teacher dropped 2 grades so there are less grades to take into account.
Example Question #111 : Data Properties
Find the mean for the set:
To find the mean, there are two steps:
1. Add all of the numbers in the set together.
2. Divide that number by the amount of numbers are in the set.
For this problem there are ten numbers so we add them up and divide by ten:
Example Question #112 : Data Properties
Find the mean of the set:
To find the mean, there are two steps:
1. Add all of the numbers in the set together.
2. Divide that number by the amount of numbers are in the set.
For this problem there are 16 numbers in the set, so we add the numbers together and divide by 16 to find the mean:
Example Question #113 : Data Properties
Find the mean of the set:
To find the mean, there are two steps:
1. Add all of the numbers in the set together.
2. Divide that number by the amount of numbers are in the set.
For this problem there are 11 numbers in the set, so we add the numbers together and divide by 11 to find the mean:
Example Question #114 : Data Properties
Find the mean of the set:
To find the mean, there are two steps:
1. Add all of the numbers in the set together.
2. Divide that number by the amount of numbers are in the set.
For this problem there are 16 numbers in the set, so we add the numbers together and divide by 16 to find the mean:
Example Question #115 : Data Properties
Find the mean of the set:
To find the mean, there are two steps:
1. Add all of the numbers in the set together.
2. Divide that number by the amount of numbers are in the set.
For this problem there are 12 numbers in the set, so we add the numbers together and divide by 12 to find the mean:
Certified Tutor
All Algebra II Resources
