Algebra 1 : Statistics and Probability

Study concepts, example questions & explanations for Algebra 1

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Example Questions

Example Question #101 : Statistics And Probability

Find the mean of the following set of numbers:

Possible Answers:

Correct answer:

Explanation:

The mean is the average, which is the sum of all the numbers divided by the number of values.

Example Question #102 : Statistics And Probability

Which answer shows the mean, median, mode, and range of the data set.

Possible Answers:

Correct answer:

Explanation:

Mean = Numbers added together divided by how many numbers there are.

Median = Middle number when put in order from least to greatest.

Mode = Most occurring number.

Range = Highest minus lowest number.

Added together the data set equals 130. There are 13 numbers.

Mean = 10

Middle number when least to greatest is .

Median =  

Most occurring number is .

Mode = 

Highest - Lowest number equals: .

Range =

Example Question #103 : Statistics And Probability

Jill is an all-star forward in hockey. She is the leading goal scorer on her team. She scored  games in her first game,  goals in her second game,  goals in her third game and  goals in her last game. What is the average number of goals that she scored in all of her games combined?

Possible Answers:

Correct answer:

Explanation:

The mean is the average of all the numbers combined.

To get the answer you would add the goals in each game together then divide by the total number of games.

So, 

Example Question #104 : Statistics And Probability

Jill is an all-star forward in hockey. She is the leading goal scorer on her team. She scored  games in her first game,  goals in her second game,  goals in her third game and  goals in her last game. What is the average number of goals that she scored in all of her games combined?

Possible Answers:

Correct answer:

Explanation:

The mean of an equation is also referred to as the average. So to solve this question all you need to do is add the total number of goals together and divide it by the number of games.

So, 

Example Question #105 : Statistics And Probability

Refer to the following set of numbers:

What is the mean of the set?

Possible Answers:

Correct answer:

Explanation:

In order to find the mean of the set, we find its average. Do this by adding up all of the numbers in the set, then dividing that answer by the amount of numbers in the set.

Example Question #106 : Statistics And Probability

Refer to the following set of numbers:

Find the mean of the set.

Possible Answers:

Correct answer:

Explanation:

In order to find the mean of the set, we find its average. Do this by adding up all of the numbers in the set, then dividing that answer by the amount of numbers in the set.

Example Question #107 : Statistics And Probability

Refer to the following set of numbers:

Find the mean of the set.

Possible Answers:

Correct answer:

Explanation:

In order to find the mean of the set, we find its average. Do this by adding up all of the numbers in the set, then dividing that answer by the amount of numbers in the set.

Example Question #107 : Statistics And Probability

Find the mean of the following data set:

Possible Answers:

Correct answer:

Explanation:

In order to find the mean for any data set, one must find the sum of all the values in the data set and then divide this sum by the number of values. Adding all of our values:

We then take this value and divide by , the number of data points.

.

Hence, our mean is .

Example Question #108 : Statistics And Probability

Sarah has  different piggy banks, and each bank has a different number of coins inside. The number of coins in each bank are as follows: . What is the mean number of coins that Sarah has in each of her banks?

Possible Answers:

Correct answer:

Explanation:

In order to find the mean of a set of numbers, we need to follow two steps:

Step 1 - First, we need to find the sum of all of the numbers in the set. For this problem, that means we need to add together the number of coins in each of the  piggy banks:

So, there are  coins total in Sarah's  piggy banks.

 

Step 2 - Next, we need to divide the sum that we got in Step 1 by the total amount of numbers in the set. We added together  different numbers in Step 1, so the amount of numbers in the set is .

 

So, the mean is . This means that there is an average of  coins in each one of Sarah's piggy banks.

Example Question #109 : Statistics And Probability

A sample of  students got scores of  and . What is the mean of these scores?

Possible Answers:

Correct answer:

Explanation:

The mean is simply the average of the five scores, which we find by adding the scores together and dividing by the number of students:

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