Understanding Measures of Center

What is the first step in calculating the mean of a data set?

• Add all the numbers together

• Organize the data from least to greatest

• Identify the middle number

• Divide the sum by the number of values

What is the mean of the data set 2, 5, 6, 7, 10, 10, 16?

• 10

• 7

• 9

• 8

How do you find the median in a data set with an even number of values?

• Choose the largest value

• Choose the smallest value

• There is no median in even numbered data sets

• Average the two middle numbers

Can a data set have more than one median?

• No, unless the data set is even

• Yes, if there are two sets of numbers

• No, there can only be one median

• Yes, if the data set is large

What does the mode represent in a data set?

• The most occurring value

• The difference between the highest and lowest values

• The average value

• The middle value

Can a data set have two modes?

• No, unless the data set has no numbers

• Yes, if two numbers appear most frequently

• No, a data set can only have one mode

• Yes, but only in odd numbered data sets

What does it mean if a data set has no mode?

• The data set is incomplete

• All numbers appear only once

• There are no numbers in the data set

• All numbers appear with the same frequency

Why might the mode not be the best measure of center?

• It can only be calculated in even numbered data sets

• It always represents the middle of the data

• It is always the smallest number in the data set

• It does not always represent the middle of the data

What is the range of a data set?

• The middle value of the data set

• The difference between the highest and lowest values

• The average of all values

• The most frequently occurring number

How is the range of the data set 2, 5, 6, 7, 10, 10, 16 calculated?

• Subtracting 2 from 16

• Averaging 2 and 16

• Multiplying 2 and 16

• Adding 2 and 16