1A.2 Dot Plots and Measures of Dispersion. Vocabulary. Dot Plot A graph that shows the frequency of values in a data set Measure of Dispersion A measure that describes the spread of a data set. To Create a Dot Plot:. 1) Find the minimum and maximum value in your data set.
1A.2 Dot Plots andMeasures of Dispersion
A graph that shows the frequency of values in a data set
Measure of Dispersion
A measure that describes the spread of a data set
1) Find the minimum and maximum value in your data set.
2) Draw a number line going from the minimum value to the maximum value.
3) Place a dot above the number on the number line for each number in your data set. If there is already a dot above the number, add an additional dot above the existing one.
When you are finished there should be a dot on the graph for each piece of data in the data set.
Find the mean, median, mode and range for the dot plot
Points in ten baseball games
Hall HS: 4, 4, 6, 6, 8, 3, 3, 2, 1, 1
Conard HS:2, 4, 8, 9, 5, 5, 1, 1, 2, 0
After the first week, the 25-year-old is voted off Show A and the 48-year-old is voted off Show B. How does this affect the mean and range of the remaining contestants on each show?
The standard deviation of a data set is a measure of how much a typical value in the data set differs from the mean.
Find the standard deviation of the ages for Show B in Example 1. Interpret your results.
You are the general manager of an NBA team. You are 35 games into the season and you are planning to sign a new player. You are choosing between player X and player Y. The points they have scored in every game so far are shown in the dot plots below. If you could sign player Y for 4 million dollars, how much more would you be willing to pay player X? Why? Justify your answer with calculations, using the ideas of center and spread.
Player X – Points per game
Player Y – Points per game