✅ 8th Grade Math (Algebra I): Mean, Median, Mode, and Range Quiz
✅ 8th Grade Math (Algebra I): Mean, Median, Mode, and Range Quiz
What is the range of the following data set: $ \{5, 12, 3, 18, 9\} $?
A) 13B) 15
C) 18
D) 21
Find the mode of the following set of numbers: $ \{2, 4, 4, 6, 8, 10\} $.
A) 4B) 5
C) 6
D) 10
Calculate the mean of the following data set: $ \{10, 15, 20, 25, 30\} $.
A) 15B) 18
C) 20
D) 25
What is the median of the data set $ \{7, 2, 11, 5, 9\} $?
A) 5B) 7
C) 9
D) 11
Find the median of the following even-numbered data set: $ \{12, 18, 14, 20\} $.
A) 14B) 15
C) 16
D) 18
What is the range of the data set $ \{-2, 4, 0, 8, 3\} $?
A) 6B) 8
C) 10
D) 12
The mean of the set $ \{x, 8, 12, 15\} $ is 12. What is the value of $ x $?
A) 11B) 12
C) 13
D) 14
Identify the mode of the following data set: $ \{2, 3, 3, 4, 4, 4, 5, 5\} $.
A) 3B) 4
C) 5
D) No mode
Consider the data set $ \{5, 6, 7, 8, 50\} $. Which measure of central tendency will change the most if the outlier 50 is replaced by the number 9?
A) MeanB) Median
C) Mode
D) They will all change equally
The mean of five numbers is 14. If four of the numbers are 10, 12, 16, and 18, what is the fifth number?
A) 12B) 14
C) 16
D) 18
Find the median of the following data set: $ \{1.2, 3.5, 2.8, 4.1, 0.9, 2.2\} $.
A) 2.2B) 2.5
C) 2.8
D) 3.0
The mean of 6 numbers is 25. If a 7th number is added to the set, the new mean becomes 27. What is the value of the 7th number?
A) 27B) 32
C) 39
D) 45
A student has an average score of 84% on their first 4 math tests. What score do they need on the 5th test to raise their overall average to 87%?
A) 90%B) 95%
C) 97%
D) 99%
The mean of the set $ \{x, x+3, x+6, x+9, x+12\} $ is 20. Find the value of $ x $.
A) 10B) 12
C) 14
D) 16
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