What piece of data goes on the \({y}\)-axis of a histogram?
Group size
Frequency
Frequency density
What does the area of the bar represent on a histogram?
Group width
How do you calculate frequency density?
Frequency ÷ group width
Frequency × group width
Frequency + group width
What would the frequency density be for group \({5} \textless {x} \textless {20}\) with a frequency of 30?
0.5
2
15
What would the frequency be for a bar with a height of 25 and a width of 10?
2.5
25
250
If the frequency density is 1.2 and the group width is 15, what is the frequency?
0.08
18
12.5
If the frequency is 10 and the frequency density is 0.5, what is the group width?
5
20
0.05
The weights of 200 students are given below.
Which of the following histograms represents this data?
What are the missing values in the table?
Frequency density = 1.2, Frequency = 40
Frequency density = 0.8, Frequency = 100
Frequency density = 1.2, Frequency = 4
What can you tell about the following histogram?
The mean and median are roughly the same
The mean is less than the median
The mean is greater than the median