Mean - SAT Subject Test in Math I
Card 0 of 20
Tom recieved an 87%, 92%, 77%, and 90% on his 4 exams. Find the mean of these scores.
Tom recieved an 87%, 92%, 77%, and 90% on his 4 exams. Find the mean of these scores.
To find the mean of a certain set of numbers we need to add all enteries together and then divide by how many numbers you have.
In our case we do:
To find the mean of a certain set of numbers we need to add all enteries together and then divide by how many numbers you have.
In our case we do:
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Karen wants to get an average of 92% at the end of the semester in her class. She has 1 test left to take before the semester is over to raise her average. If she recieved an 88%, 87%, 95%, and 93% on her tests what does she need to recieve on her last test to obtain the 92% average?
Karen wants to get an average of 92% at the end of the semester in her class. She has 1 test left to take before the semester is over to raise her average. If she recieved an 88%, 87%, 95%, and 93% on her tests what does she need to recieve on her last test to obtain the 92% average?
For this question we need to set up an equation to find the mean, set it equal to our desired mean of 92 and solve for our missing test value.
From here we perform algebraic procedures to simplify the equation
For this question we need to set up an equation to find the mean, set it equal to our desired mean of 92 and solve for our missing test value.
From here we perform algebraic procedures to simplify the equation
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Clara recieved 10 apples on Monday, 9 apples on Tuesday, and 5 apples on Wednesday. What was the average number of apples she recieved?
Clara recieved 10 apples on Monday, 9 apples on Tuesday, and 5 apples on Wednesday. What was the average number of apples she recieved?
To solve this problem we use the equation to find the mean. We add all entries and then divide by the number of entries we have. It is as follows:
To solve this problem we use the equation to find the mean. We add all entries and then divide by the number of entries we have. It is as follows:
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On her past five tests, Julie scored 
. What was the mean of her scores?
On her past five tests, Julie scored
The mean is the same as the average. To find the mean, use the following formula:
The mean is the same as the average. To find the mean, use the following formula:
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The following stem and leaf plot illustrates the number of baseball cards owned by a group of friends. What is the average number of baseball cards that each individual owns?
The following stem and leaf plot illustrates the number of baseball cards owned by a group of friends. What is the average number of baseball cards that each individual owns?
First, write out the individual values found within this stem and leaf plot to figure out how many values there are.
Now, finding the mean is the same as finding the average. Recall how to find the average:
Thus, the mean number of baseball cards owned is found by the following:
First, write out the individual values found within this stem and leaf plot to figure out how many values there are.
Now, finding the mean is the same as finding the average. Recall how to find the average:
Thus, the mean number of baseball cards owned is found by the following:
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In order for Michael to get a "B" in his trigonometry class, he needs to have an average of 
on all his tests. He has one test remaining. His scores on his previous tests are 
. What score does Michael need on his last test to get a "B"?
In order for Michael to get a "B" in his trigonometry class, he needs to have an average of
Recall how to find the average of a set of numbers:
Now, let 
be the score Michael needs on his last test in order to have a test average of 
.
Now, solve for 
.
Recall how to find the average of a set of numbers:
Now, let
Now, solve for
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The average temperature for a city is given by the following graph.
What is the average temperature for the months of May-September?
The average temperature for a city is given by the following graph.
What is the average temperature for the months of May-September?
First, figure out the temperatures.
May: 
June:
July: 
August: 
September:
Now, recall how to find the mean of a set of numbers:
First, figure out the temperatures.
May:
June:
July:
August:
September:
Now, recall how to find the mean of a set of numbers:
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The mean of 
is 
. Find the value of 
.
The mean of
Recall how to find the mean:
Recall how to find the mean:
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The mean of 
is 
. Find the value of the smallest number.
The mean of
Recall how to find the mean:
Now, because the question asks you to find the smallest number, you need to find the value of 
.
Recall how to find the mean:
Now, because the question asks you to find the smallest number, you need to find the value of
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The average of 
is 
. Find the value of the largest number.
The average of
Recall how to find the mean:
Now, because the question asks you to find the largest number, we need to find the value of 
.
Recall how to find the mean:
Now, because the question asks you to find the largest number, we need to find the value of
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In terms of 
, what is the mean of 
?
In terms of
Recall how to find the mean:
Recall how to find the mean:
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In terms of 
, what is the mean of 
?
In terms of
Recall how to find the mean:
Recall how to find the mean:
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The average of 
is 
. Find the sum of the largest and smallest numbers for this set of numbers.
The average of
Recall how to find the mean:
The smallest number in this set is 
, which is 
. The largest number is 
, which is 
.
The sum of these two numbers is then given by the following:
Recall how to find the mean:
The smallest number in this set is
The sum of these two numbers is then given by the following:
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The average for a set of 
numbers is 
. After another number is added to the set, the average changes to 
. What number was added to the set?
The average for a set of
Recall how to find the mean:
First, find the sum of all the values when there are just 
numbers in the set.
Next, find the sum of all the values when there are 
numbers in the set.
To find what number is added, take the difference between the sum of 
values and the sum of 
values.
Recall how to find the mean:
First, find the sum of all the values when there are just
Next, find the sum of all the values when there are
To find what number is added, take the difference between the sum of
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In terms of 
, what is the average of 
?
In terms of
Recall how to find the mean:
Recall how to find the mean:
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Jack has an average of 
on four exams. If he has one more exam and he wants to bump his average up by 
points, what must he score to get that average he wants?
Jack has an average of
First, we need to find the total number of points for his fourth exam. That would be 
or 
. The reason we do this is because we can calculate his point total with the new average and determine his final score by taking the difference. So 
. We subtract 
and 
to get 
as our answer.
First, we need to find the total number of points for his fourth exam. That would be
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If Joe received a 
and 
on his first four exams, what would he need to get on the final exam in order to finish with an average of 
?
If Joe received a
The equation to find the average of his five grades would look like
.
You must solve for 
, so the first step is to multiple both sides by 
to get
.
Then you subtract all of the other grades from the total of 
to get a final answer of 
for the grade of the final exam.
The equation to find the average of his five grades would look like
You must solve for
Then you subtract all of the other grades from the total of
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What is the mean of: 
?
What is the mean of:
Step 1: Find the sum of the values...
Step 2: Find how many numbers are given...
There are 
numbers.
Step 3: To find the mean, divide the sum by how many numbers....
Step 1: Find the sum of the values...
Step 2: Find how many numbers are given...
There are
Step 3: To find the mean, divide the sum by how many numbers....
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Find the mean of: 
Find the mean of:
Step 1: Find the sum of all the numbers...
Step 2: Count how many numbers there are...
There are 
elements.
Step 3: Divide the total sum by the number of elements...
Step 1: Find the sum of all the numbers...
Step 2: Count how many numbers there are...
There are
Step 3: Divide the total sum by the number of elements...
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Find the mean of the following set:
Find the mean of the following set:
Another word for mean is average. To find the average of this set of numbers, add them up, then divide by the amount of numbers in the set. In this case there are 9 numbers in the set, meaning we will divide our answer by 9.
Another word for mean is average. To find the average of this set of numbers, add them up, then divide by the amount of numbers in the set. In this case there are 9 numbers in the set, meaning we will divide our answer by 9.
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