ISEE Upper Level Math : Data Analysis
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Example Questions
Example Question #81 : Data Analysis And Probability
Find the mean of the following data set:
Find the mean of the following data set:
For this question, the mean is essentially the same as the average.
Find the mean by adding up all our terms and dividing by the total number of terms.
In this case n=11 because we have 11 terms in our data set.
The sum can be found by adding our terms together.
So our mean is 59
Example Question #82 : Data Analysis And Probability
Find the mean of the following data set:
Find the mean of the following data set:
First, let's put our terms in ascending order.
Next, find the mean by adding up our terms and dividing by the total number of terms.
We have eleven terms, so our denominator will be eleven.
So our mean is 65
Example Question #83 : Data Analysis And Probability
Use the following data set to answer the question:
Find the mean.
To find the mean, or average, of the data set, we will use the following formula:
So, given the data set
we will calculate the sum. To do that, we will add the numbers together. So,
Now, we will calculate the following:
because if we count and see how many numbers are in the set, we get 10.
Knowing this, we can substitute into the formula. We get
Example Question #84 : Data Analysis And Probability
If the mean of 
Recall that the mean is the same as the average.
Let 
Now, find the average of these numbers, and solve for 
The smallest number is 
Example Question #85 : Data Analysis And Probability
A Math class took an exam. These were their scores:
Find the mean score.
To find the mean of a data set, we will use the following formula:
Now, given the following set of Math test scores
we can calculate the following:
Now, we will calculate the following:
because there are 9 numbers in the set.
Knowing all of this, we can substitute into the formula. We get
Therefore, the mean score of the Math exams is 87.
Example Question #31 : Mean
Find the mean of the following data set:
Find the mean of the following data set:
Find the mean by first summing up our terms, then dividing by the number of terms we have.
In this case, we have 11 terms, so our denominator is 11
So, our mean is 47
Example Question #32 : Mean
For his last six math tests, Josh scored 92, 80, 88, 94, 97, and 95. What is his mean test score?
Recall that the mean is the same as the average.
To find the average, add up all the terms that are given and divide by the number of terms there are.
His mean score is a 
Example Question #88 : Data Analysis And Probability
In a class of 
| Number of Siblings | Number of Students with the Specific Number of Siblings |
| 0 | 5 |
| 1 | 9 |
| 2 | 4 |
| 3 | 2 |
What is the mean number of siblings for this class?
Recall that the mean is another way of saying "average."
To find the average, we will need to find the total number of siblings the class has, then divide by the number of students in the class.
Thus, the mean number of siblings the class has is
Example Question #89 : Data Analysis And Probability
Michael received the following scores on his last four French tests: 65, 58, 69, 58.
If his mean test score must be a 70 in the class to pass, what must he score on his fifth test?
Remember that the mean is the same as the average.
Let 
Solve for 
Michael must score 
Example Question #90 : Data Analysis And Probability
Over the course of seven games, Joanna scored the following number of points for her high school's varsity basketball team:
In order for her to be considered for the state-wide all-star team, she needs to have a mean score of 15 points per game for the entire season. If there is only one game left in the season, how many points must Joanna score in order to make it on to the all-star team?
Recall that the mean is just the same as the average. Let 
Now, solve for 
Joanna must score 
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