Statistics - GED Math

Rewrite the data set from least to greatest.

Average the central two numbers.

The answer is:

Reorder the numbers in the data set from least to greatest.

The median is the central number for an odd set of numbers.

The answer is:

Reorder the numbers from least to greatest.

For an even number of values in a set of data, the median is the average of the central two numbers.

The answer is:

There are thirteen test scores, an odd number, so the median of the test scores is the score which, after the scores are ordered, appears in the middle. Order the scores from greatest to least:

12, 19, 19, 20, 22, 22, 22, 23, 28, 28, 29, 34, 35

As there are scores, we are seeking out the score that ranks at number

That is, the median is the seventh-highest score. This score can be seen to be 22.

There are fourteen test scores, an even number, so the median of the test scores is the arithmetic mean of the two scores which, after the scores are ordered, appear in the middle. Order the scores from greatest to least:

12, 19, 19, 20, 22, 22, 22, 23, 28, 28, 29, 34, 35, 50

As there are scores, we are seeking out the score that ranks at number

from the top, and number 7 from the bottom.

That is, the median is the arithmetic mean of the seventh-highest and seventh-lowest scores. These scores can be seen to be 22 and 23, so the median of the scores is

In this list,

In order for John to maintain a 90 average for the marking period, his total for four tests must be 360.

or

If you add up the scores that he already received, he already has 267 points.

If you take the total of 267, which is the total amount of points for the three tests already taken and subtract it from the 360 points which is the total amount of points needed for a 90 average, he would need to get a 93 on his last test.

The mean score is the sum of all scores divided by the number of scores.

First, find the sum of all three test scores, then divide by the number of tests, 3.

If Veronica wants her average to be 80, the equation becomes:

We need to solve for .

First, multiply both sides of the equation by 3:

Subtract 146 from both sides:

Veronica must score a 94 on her third test in order to bring her mean score to 80.

The meanof a set is the sum of all elements divided by the number of elements in the set:

The mean is $6.

The meanin a data set of scores is the sum of all scores divided by the number of scores:

Call the fourth test score . Plug in what we know and solve for :

Multiply both sides by 4:

Then, subtract 266 from both sides:.

To finish with a mean of 90, James must score a 94 on his fourth test.

The mean is the average of all the numbers in the set of data.

Add the numbers together and divide the sum by 4.

The answer is:

The mean is the average of all the number ins the data set.

Add all the numbers and divide the sum by four.

The answer is:

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

So, given the set

we can calculate the following:

We can also calculate the following:

because there are 7 numbers in the data set.

So, we can substitute. We get

Therefore, the mean of the data set is 86.

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

Now, given the set

We can calculate the following:

We can also calculate the following:

because if we count, we can see there are 9 numbers in the set.

So, we can substitute. We get

Therefore, the mean score is 84.

The mean is the average of all the numbers in the data set.

Add all the numbers and divide the total by four.

Reduce the fraction.

The mean is:

The mean is the average of all the numbers in the set of numbers.

Add the numbers and divide the quantity by four.

The mean is:

The mean is the average of all the numbers in the data set.

Sum all the numbers and divide the quantity by 4.

The answer is: