ISEE Middle Level Math : Data Analysis

Study concepts, example questions & explanations for ISEE Middle Level Math

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Example Questions

Example Question #351 : Data Analysis

Find the mean of the following data set:

Possible Answers:

Correct answer:

Explanation:

Find the mean of the following data set:

Begin by finding the sum of our terms.

Next, because we have 11 terms, we need to divide the sum by 11

So our mean is 43

Example Question #352 : Data Analysis

Use the following data set to answer the question.

Find the mean of the data set.

Possible Answers:

Correct answer:

Explanation:

To find the mean of a data set, we will use the following formula:

 

So, given the data set

we can find the sum of the numbers in the set.  To find the sum, we will add all the numbers together.

 

Now, we will find the number of numbers within the set.  To do this, we will just count and see how many numbers are in the set.

 

Now, we can substitute what we know into the formula.  We get

 

Therefore, the mean of the data set is .

Example Question #351 : Data Analysis

Use the following data set to answer the question.

Find the mean of the data set.

Possible Answers:

Correct answer:

Explanation:

To find the mean of a data set, we will use the following formula:

 

So, given the data set

we can find the sum of the numbers in the set.  To find the sum, we will add all the numbers together.

 

Now, we will find the number of numbers within the set.  To do this, we will just count and see how many numbers are in the set.

 

Now, we can substitute what we know into the formula.  We get

 

Therefore, the mean of the data set is .

Example Question #101 : Mean

Find the mean of the following data set.

Possible Answers:

Correct answer:

Explanation:

Find the mean of the following data set.

To find the mean, we must find the average.

To do so, find the sum of our terms, and divide by the number of terms.

Now, we have eleven terms, so...

So, we can say that our mean is 76

Example Question #103 : How To Find Mean

Use the following data set to answer the question:

Find the mean.

Possible Answers:

Correct answer:

Explanation:

To find the mean, or the average, we will use the following formula:

 

So, given the set

we will first find the sum.  To find the sum, we will add all of the numbers.  So,

 

Now, we will determine the number of numbers within the set.  In other words, we will count and see how many numbers are within the set. So,

 

Now, we will substitute this into the formula.  We get

We can cancel the zero in  and the zero in .  We get

 

Therefore, the mean of the data set is .

Example Question #662 : Isee Middle Level (Grades 7 8) Mathematics Achievement

Use the following data set to answer the question:

Find the mean.

Possible Answers:

Correct answer:

Explanation:

To find the mean (or average) of the data set, we will use the following formula:

 

Now, given the set

we will first find the sum.  To find the sum, we will add all of the numbers together. So,

 

Now, we will find the number of numbers in the set.  To do this, we will simply count and see how many numbers are in the set. We get

 

Now, we can substitute what we know into the formula.  We get

 

Therefore, the mean of the data set is .

Example Question #102 : Mean

Use the following data set to answer the question:

Find the mean.

Possible Answers:

Correct answer:

Explanation:

To find the mean of a data set, we will use the following formula:

 

So, given the set

we can calculate the following.

 

We can also calculate the following.

because if we count and see how many numbers are in the set, we count 10 numbers.

 

Now, knowing this, we can substitute into the formula.  We get

 

Therefore, the mean of the data set is 6.

Example Question #357 : Data Analysis And Probability

Use the following data set to answer the question

Find the mean.

Possible Answers:

Correct answer:

Explanation:

To find the mean of a data set, we will use the following formula:

 

Now, given the set

we can calculate the following:

 

Now, we can calculate the following:

because if we count the numbers within the set, we can see there are 11 numbers.

 

Knowing this, we can substitute into the formula.  We get

 

Therefore, the mean of the data set is 5.

Example Question #103 : Mean

Use the following data set to answer the question:

Find the mean.

Possible Answers:

Correct answer:

Explanation:

To find the mean of the data set, we will use the following formula:

 

So, given the data set

we can calculate the following:

Now, we can calculate the following:

because if we count the numbers in the set, we can see there are 11 numbers.

 

Now, knowing this, we can substitute into the formula.  We get

 

Therefore, the mean of the data set is 6.

Example Question #359 : Data Analysis And Probability

A Math class took an exam.  Here are the scores of 11 students:

Find the mean score.

Possible Answers:

Correct answer:

Explanation:

To find the mean, we will use the following formula:

 

Now, given the set

We can calculate the following:

 

 

Now, we can calculate the following:

Because there are 11 numbers in the set.

 

Knowing this, we can substitute into the formula.  We get

 

 

Therefore, the mean of the data set is 87.

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