Measures of Center
Center from Displays
Measures of Spread
100
What is the median of this data set?
6, 8, 2, 10, 4
6
100
What is the mode of the dotplot below?
0 hours
100
What is the range of the data set below?
51, 54, 56, 48, 67, 59, 61, 63, 64
67 - 48 = 19
MAKE SURE YOUR LIST IS IN ORDER!
200
What is the mean of this data set?
3, 7, 6, 5, 10
6.2
200
Calculate the median of the dotplot below.
84
200
Which dot plot has a larger standard deviation?
After Exercise (bottom graph)
300
Haley wants to bring up her grade in biology. She got a 87, 79, and a 92 on the first three quizzes. What would she need on the last test to bring up her quiz average to a 90?
102 (extra credit???)
300
What is the average number of cars?
1.1 cars
300
What is the IQR of the data set below?
5, 6, 7, 2, 1, 4, 7
7 - 2 = 5
MAKE SURE DATA IS IN ORDER
400
Find missing value using the information below.
13, 16, 17, 4, 7, x
mean = 10
x = 3
400
What is the median temperature?
75-80 degrees
400
A new student joined the class and reported that he read 20 books over the summer. If he is added to the dot plot below, would the standard deviation increase, decrease, or stay the same?
Increase (more spread out!)
500
The average of the data values below is 10. Solve for x.
2x, 5x-1, 6, x+3
x=4
500
Kyla's grade report from her English class is below. What would be her overall average in class?
72.9 (C-)
500
The frequency table below includes data on the number of pets owned by students in Mr. Johnson's class. A new student joins the class and reports that they own 10 dogs. How would the new student affect the standard deviation of the data set? Explain why!
The standard deviation would increase because the data is becoming more spread out.