GRE Subject Test: Math : Statistics

Study concepts, example questions & explanations for GRE Subject Test: Math

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Example Questions

Example Question #521 : Gre Subject Test: Math

What is the mean of: 

Possible Answers:

Correct answer:

Explanation:

Step 1: Find the sum of the numbers



Step 2: Count how numbers there are:

There are  numbers..

Step 3: Divide Sum by how many numbers

Example Question #21 : Statistics

What is the mean of: 

Possible Answers:

Correct answer:

Explanation:

Step 1: Find the sum of all the numbers:



Step 2: Count how many numbers there are:

There are 22 numbers.

Step 3: Divide the sum by how many numbers there are:



The mean is 

Example Question #21 : Statistics

What is the mean of: 

Possible Answers:

Correct answer:

Explanation:

Step 1: Take the sum of all numbers in the set...

Step 2: Count how many elements are in the set...

There are  numbers

Step 3: To find the mean, divide the sum by the number of elements..



The mean is 

Example Question #527 : Gre Subject Test: Math

In the set, , is the mean bigger than the median?

Possible Answers:

Cannot Tell

None

Yes

No

Correct answer:

Yes

Explanation:

Step 1: Calculate the Mean..

Take the sum of all the numbers in the set...

Divide the sum by how many numbers there are...
=Mean
Step 2: Calculate the Median:
The median of this set is the number in the middle.


Count how many numbers are in the set...
There are ...

So, the median is the th number in the set.

The th number is .

The mean is bigger than the median, so the answer is true. 

Example Question #528 : Gre Subject Test: Math

Tommy got  on the first three tests. What must he score on the fourth test so that the average is 81?

Possible Answers:

Correct answer:

Explanation:

Step 1: Find the total sum of the tests. To do this, we multiply the average by the number of tests:

Total=
Step 2: To find the missing term, we subtract each of the three test scores that are provided...

.

Tommy needs an  on his fourth test to get that average...

Example Question #21 : Probability & Statistics

What is the mean of 

Possible Answers:

Correct answer:

Explanation:

Step 1: Find the sum of the numbers in the set...

Step 2: Count how many numbers are in the set..

There are 10 numbers...

Step 3: Divide the total sum by how many numbers...

So,  

Example Question #22 : Statistics

What is the mean of 

Possible Answers:

Correct answer:

Explanation:

Step 1: Find the sum of all the terms

Step 2: Count how many numbers are in the set

There are  numbers.

Step 3: Divide the sum (Step 1) by how many numbers in the set (Step 2)




Example Question #31 : Other Topics

What is the mean of: ?

Possible Answers:

Correct answer:

Explanation:

Find the sum of all the numbers in the set:


Count how many numbers are in the set...

There are six numbers...

Divide the sum of the set by how many numbers to find the mean...

Example Question #22 : Statistics

What is the mean of 

?

Possible Answers:

None

Correct answer:

Explanation:

Find the sum of all the numbers in the set:



Count how many numbers are in the set...

There are  numbers..

To find the mean, divide the sum by how many numbers...


Example Question #31 : Probability & Statistics

What is the mean of: ?

Possible Answers:

Correct answer:

Explanation:

Step 1: To find the mean, we need to first find the sum of the numbers in the set.

Step 2: Count how many numbers are in the set...

There are  numbers in the set.

Step 3: To find the mean, divide the sum of the numbers in the set by how many numbers there are in the set...

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