Data Displays
Measures of Center and Variability
Measures of Center and Variability
Box Plots
100
How do you find the mode of data?
the number that occurs the most
100
What is the median of the data: 3, 7, 8, 12, 14
8
100
What is the mean of the dataset 5,10,15?
10
100
In a box plot, what does the first line the box represent?
Q1
200
How do you find the range of a data set?
Maximum - minimum
200
How do you calculate the mean of a data set?
Add all the numbers together and divide by the count of numbers
200
In the dataset 4,6,6,8,10, what is the mode?
6
200
In a box plot, what does the third line represent?
Q3
300
What does variability tell you about the data?
The more spread out the data is. The less consistent it is.
300
What is the mode of the data set 2,3,4,4,5 ? And why?
4
It occurs the most.
300
How do we find the median when there are two numbers in the middle?
Add the two numbers in the middle and divide by 2.
300
How do you find the IQR of a box plot?
Q3- Q1
400
How do you find the median value?
Order the numbers least to greatest, then use "magic fingers" to find the middle.
400
How do you find the range of date?
highest number minus the lowest number
400
What is the range of 2, 4, 6, 8, 10?
10 - 2= 8
400
What percentage does each box and whisker represent in a box plot?
25%
500
What values does a box plot show us?
(Hint: there are 5)
Least value, Q1, Q2, Q3, and max. value
500
Find the mean of 10, 12,14, 16, 18?
14
500
What is the IQR (Interquartile Range) of 1, 3, 4, 6, 8, 9 ?
6-3 =3
500
Which data set is easier to make predicitons with?
Group A- IQR is 25 compared to group B who has an IQR of 28.