Understanding Measures of Center

What does the mean represent in a data set?

• The middle value

• The most frequent value

• The range of values

• The average value.

How do you calculate the mean?

• Multiply the values together

• Subtract the smallest value from the largest

• Add all values, then divide by the total number

• Divide the largest value by the smallest.

What is the median of this data set: 5, 9, 3, 7, 11?

• 5

• 7

• 9

• 11

When is the median useful?

• To summarize data with many outliers

• To find the most common value

• To measure the spread of data

• To calculate averages

If a data set has no repeating values, what is the mode?

• The largest value

• One mode

• No mode

• Two modes

What is the missing value in this data set if the mean is 50? 60, 40, 70, x

• 30

• 40

• 50

• 60

What is the formula for calculating the mean?

• Mean = Total of values ÷ Number of values

• Mean = Largest value ÷ Smallest value

• Mean = Sum of largest and smallest values

• Mean = Total of values × Number of values

How do you find the median of an even-numbered data set?

• Use the middle value

• Average the two middle values

• Subtract the smallest value from the largest

• Multiply the two middle values

What is the mode of this data set: 6, 8, 6, 10, 12?

• 6

• 8

• 10

• 12

Why might someone use the mode instead of the mean?

• It shows the middle of the data

• It highlights the most common value

• It summarizes all values

• It eliminates outliers