Measures of Center and Variation in Graphs

What is the mean in this data set?

round to the nearest tenth

Mathematical Equivalence

ON

What is the median in this stem and leaf plot?

Mathematical Equivalence

ON

What is the mean in this stem and leaf plot? round to the nearest tenth

Mathematical Equivalence

ON

Johnny is recording the times it took 200 people to run a marathon and putting it in a graph. Which 2 graphs would display the data the best?

Which line plot has a greater range?

What is the difference between the medians for the two data sets?

Mathematical Equivalence

ON

Kerri is going around town asking 450 random people how tall they are in inches and putting this data on a graph. Which 3 graphs would be her best choice?

If you add up all the values in a data set and then divide by the number of values, you have calculated the ____ of the data set.

• mean

• median

• mode

• range

If you order all the values in a data set from least to greatest and then identify the data value in the center, you have calculated the ____ of the data set.

• mean

• median

• mode

• range

If you identify the value that occurs most frequently in a data set, you have calculated the ____ of the data set.

• mean

• median

• mode

• mean absolute deviation