Measures of Center
Measures of Variation
Data Displays
100
Why is the mean considered a measure of center?
...
100
Find the IQR.
18, 22, 15, 16, 15, 13, 19, 18
3.5
100
The double box-and-whisker plot represents the prices of snowboards at two stores. Which store’s prices are more spread out?
Store B
200
In your class, 7 students do not receive a weekly allowance, 5 students receive $3, 7 students receive $5, 3 students receive $6, and 2 students receive $8. What is the mean weekly allowance?
$3.50
200
Find the MAD.
101, 115, 124, 125, 173, 165, 170
26
200
The data displays show how many pounds of garbage apartment residents produced in one week. Which data display can you use to find the number of residents who produced more than 25 pounds of garbage?
The stem and leaf plot.
300
On a test, Walter scored 86, Bev scored 72, Claire scored 61 and Rachel scored 93. Tyler didn’t remember his score, but he knew that his score was both the mean and the median of all five students’ scores. What was Tyler’s score?
78
300
Find the interquartile range (IQR) of the data in the dot plot below.
0, 0, 0, 1, 2 2 2, 2, 2, 3, 4
IQR = 2
300
Consider the data used to create this histogram. What is the smallest possible range value?
9.17 – 9.07
0.1
400
What is the absolute difference between the mean and the median of the first nine prime numbers? Express your answer as a fraction.
1/9
400
Stella is trying out for the track team, and she had three triple jump attempts. The distance of each jump attempt is measured to the nearest inch, and her first two attempts measured 36' 4" and 38' 4", respectively. If Stella's third attempt measured no less than her first attempt and no more than her second attempt, what is the difference between the greatest and least possible averages for the three triple jump attempts?
8 inches
400
A set of six different positive integers has a median and mean of 6. If the largest number in the set is 12, what is the largest possible sum for the three largest numbers?
29