Algebra 1 : Algebra 1
Study concepts, example questions & explanations for Algebra 1
All Algebra 1 Resources
Example Questions
Example Question #11 : How To Find Standard Deviation
If the variance of a data set is 60, what must be the standard deviation? Round to three decimal places.
The standard deviation is the square root of variance.
Substitute the variance.
The answer is:
Example Question #1 : How To Find Range
We want to create a three digit code for a combination lock. Only digits from 0-9 are allowed and digits can be repeated. How many such codes can be generated?
The first position can be filled 10 ways and since repetition is allowed, the 2nd position can be filled in 10 ways and similarly the third position can be filled in 10 ways as well, giving us the correct answer of
Example Question #1 : How To Find Range
You are given the following number set:
2, 8, 3, 6, 9, 10, 5
Find the range.
The range is the difference between the lowest and the highest number in the number set.
The lowest number in the number set is 2 while the highest number is 10. Therefore, the range is calculated as
So 8 is the range.
Example Question #1 : How To Find Range
Evaluate:
This is a combination problem. All we need to solve this problem is the combination formula:
Now
and
Instead of finding answers for all of these factorials, notice that they have many of the same terms and can therefore be cancelled.
Example Question #1 : How To Find Range
A teacher is grading quizzes and recording the scores in her records. The scores are recorded as follows: 81, 91, 83, 88, 74, 98, 81, 94, 68, 92, 77, 79, 83, 91, 81, 84, 85, 81, 85, 79, 83, 81, 83.
What is the range?
The range of the statistics is simply the difference between the largest value and the smallest value.
The largest number in the set is 98, and the smallest number is 68.
Subtract to find the range:
Example Question #31 : Basic Statistics
Given the set of test scores, what is the range?
The range is the difference between the smallest number and the largest number. The smallest value is 77, and the largest is 98.
98 – 77 = 21
Example Question #32 : Basic Statistics
The range of the following data set is 18. What is a possible value for 
Cannot be determined
Arrange the known values in the set in numerical order: {–5, –2, 1, 3, 5, 7, 7, 10}. The range is the difference between the largest value and smallest value.
x must be either the largest or the smallest value in the set.
range = x – smallest value
18 = x – (–5)
18 = x + 5
13 = x
OR
range = largest value – x
18 = 10 – x
8 = –x
–8 = x
Example Question #3 : Range
The above chart shows a specific week of work at an advertising firm. What is the range of the hourly rates of the workers?
The range is difference between the largest value and the smallest value.
Example Question #4 : Range
What is the range of the set 
The range is defined as the difference between the highest and lowest numbers in a set. Here, the highest number is 
Therefore, the range is
Example Question #1 : How To Find Range
In the set of numbers, what is the range?
To determine the range of this data set, take the largest number and subtract it with the smallest number.
The largest number in the set is ten.
The smallest number in the set is 
Subtract both numbers.
Certified Tutor
Certified Tutor
All Algebra 1 Resources
