Exploring Dot Plots and Histograms

What is a dot plot?

• A way to measure central tendency

• A type of pie chart

• A graphical display of data using dots

• A method for calculating averages

How do you find the range of data in a dot plot?

• Subtract the lowest value from the highest value

• Divide the total number of dots by the number of different values

• Count the number of dots

• Add all the values together

What does a symmetric distribution in a dot plot look like?

• Values increase then decrease at the same rate

• All values are the same

• Values only increase

• Values are randomly distributed

What is the mean number of books read by the students?

• 5

• 113

• 25

• 4.52

Which measure of central tendency is best used when there is an outlier in the data?

• Mean

• Median

• Mode

• Range

What is a histogram?

• A graphical display of data using lines

• A type of scatter plot

• A method for calculating medians

• A graphical display of data using adjacent bars

How is the range of ages calculated in a histogram?

• Subtracting the youngest age from the oldest age

• By counting the bars

• Adding all the ages together

• Dividing the total number of workers by the number of age groups

How many workers are older than 30?

• 11

• 6

• 2

• 3

What is one disadvantage of a histogram compared to a dot plot?

• It cannot show large ranges of data

• It is more complex to create

• It can only show positive values

• It cannot display exact values, only intervals

Why might histograms be preferred over dot plots for large ranges of data?

• They require less space to display

• They are easier to create

• They condense data into intervals, making it easier to analyze

• They show exact values more clearly