ISEE Upper Level Math : Data Analysis and Probability
Study concepts, example questions & explanations for ISEE Upper Level Math
All ISEE Upper Level Math Resources
Example Questions
Example Question #111 : Data Analysis And Probability
Use the following data set to answer the question:
Find the mode.
To find the mode of the data set, we will find the number that appears most often. So, given the set
we can see the number that appears most often is 5 (it appears 3 times).
Therefore, the mode of the data set is 5.
Example Question #111 : Data Analysis And Probability
Use the following data set to answer the question:
Find the mode.
To find the mode of a data set, we will find the number that appears most often.
So, given the set
we can see the number that appears most often is 6 (it appears 3 times).
Therefore, the mode of the data set is 6.
Example Question #112 : Data Analysis And Probability
Use the following data set of test scores to answer the question:
Find the mode.
To find the mode of a data set, we will find the number the appears most often.
So, given the set
We can see the number that appears most often is 99.
Therefore, the mode of the data set is 99.
Example Question #1 : How To Find Range
For tonight’s class reading, Erin was assigned to read Chapter 6, which begins on page 60 and ends on page 83. How many pages must Erin read tonight?
24
23
25
22
24
Erin will start reading on page 60 and will stop reading on page 83.
If you subtract these two numbers, you will get the number of pages between 60 and 83:
However, this subtraction does not include the first page read - page 60. Consider a similar, more simpler case: reading from pages 1 to 3. There are three pages read there: 1, 2, and 3. If you subtract, you get an answer of 2, which leaves you one page short of what you actually read.
So when you subtract 60 from 83, it gives you the pages between those two markers. You need to add on one more page to get your total page count - that is, to include page 60.
Therefore, Erin will read 24 pages.
Example Question #1 : Range
Consider the following set of scores from a math test. Give the range of the data.
The range is a measure of spread. It is the difference between the largest and the smallest data values. So we get:
Example Question #1 : Range
In the following set of data, 
The range is a measure of spread. It is the difference between the largest and the smallest data values. So we can write:
Example Question #2 : Range
Examine this stem-and-leaf display for a set of data:
What is the midrange of this data set?
The "stem" of this data set represents the tens digits of the data values; the "leaves" represent the units digits.
The midrange of a data set is the arithmetic mean of its greatest and least values, which, in this case, are 47 and 87. Their arithmetic mean is 
Example Question #3 : Range
What is the range of the following set of numbers?
To determine the range, first order the numbers in order from least to greatest. Then, find the difference between the greatest number and the least number:
Thus, the range is 172.
Example Question #4 : How To Find Range
What is the range of the following 5 numbers?
The range of a set is determined by subtracting the smallest number from the largest number:
Example Question #5 : How To Find Range
What is the range of the following series of numbers?
Reorder the numbers from smallest to largest:
7, 14, 19, 22, 30, 31, 47
The range is the difference between the largest and smallest values:
All ISEE Upper Level Math Resources
