Algebra 1 : Statistics and Probability

Study concepts, example questions & explanations for Algebra 1

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Example Questions

Example Question #61 : Statistics And Probability

Using the data above, find the mean. 

Possible Answers:

Correct answer:

Explanation:

To find the mean of the data set, all of the data values must be added together.

In this set provided, 

.

The next step is to divide the sum of the data values by the amount of data values, .

Since the answer to this is a repeating decimal, leaving it in the form of a fraction would suffice. Remember, fractions can be read as division problems, thus division problems can be written as fractions.

So  is equivalent to 

Example Question #62 : Statistics And Probability

Using the data provided, find the mean. 

Possible Answers:

Correct answer:

Explanation:

The mean is defined as the average of the group of data.

Using the data set provided, to find the mean all we must do is add up the data and divide by the amont of data values, 

n = amt of data values, x = data value.

Now that we have the formula we just plug in the numbers,

  

.  

Example Question #63 : Statistics And Probability

Find the mean of the above data set.

Possible Answers:

Correct answer:

Explanation:

To find the mean, or the average, all that is required is to add up the values and then divide by the number of data pieces in then. In this data set, we have only four pieces of data. Our equation should look like this: 

.

Once the values our added, our fraction can be simplified to: 

.

This is our mean. 

Example Question #61 : Statistics And Probability

Using the data above, if the mode equals , what is  ? 

Possible Answers:

Correct answer:

Explanation:

This problem is meant to divert our attention to the large numbers present. Finding the mode of a data set requires no calculation. The mode is simply the number that appears the most often.

In this set, each number appears only once, except for the number  

That, therefore, is the mode.

But this question is asking if the mode = x, and the mode is .

Then 

Example Question #61 : How To Find Mean

Five students went to a pizza parlor. One student ate 4 slices, two students ate 3 slices of pizza, and two students ate 2 slices of pizza.

Find the mean or average number of slices of pizza each student ate.

Possible Answers:

Correct answer:

Explanation:

In order to find the mean or average number of slices of pizza eaten, we need to find the total number of slices eaten and divide it by the number of students.

Add the slices of pizza eaten by each student.

 

Then you divide by the number of students in the group.

The average number of slices eaten was.

Example Question #1491 : Algebra 1

Using the data above, find the mean. 

Possible Answers:

Correct answer:

Explanation:

Provided with this set of data:  

,

to find the mean the first step is to add up all of the numbers in the data set: 

 

Now we divide that number by the number of data pieces there are,  

So,  is the mean of this data set. 

Example Question #1491 : Algebra 1

Using the data above, find the mode and mean. 

Possible Answers:

Correct answer:

Explanation:

Using the data provided: 

 

find the mean and the mode.

First, the mode is defined as a number that appears more than once. In this set, all four numbers are different, so there is no mode.

To find the mean we first add up all of the values: 

.

Next, we divide this total by the amount of data pieces, 

.

This is the mean. 

Example Question #1492 : Algebra 1

Find the mean for the following set of numbers:

, and 

 

 

Possible Answers:

Correct answer:

Explanation:

The mean is the same as the average. To find the mean, use the following formula:

 

Example Question #62 : How To Find Mean

Find the mean for the following set of numbers:

, and 

 

Possible Answers:

Correct answer:

Explanation:

The mean is the same as the average. To find the mean, use the following formula:

Example Question #11 : Mean

Find the mean for the following set of numbers: 

, and 

Possible Answers:

Correct answer:

Explanation:

The mean is the same as the average. To find the mean, use the following formula:

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