Lesson 28-3 Lesson 28-3 PraCtiCe Activity 28

Lesson 28-3
Summarize the Center of a Distribution
Activity 28
continued
My Notes
LESSON 28-3 PRACTICE
19. Reason quantitatively. Mr. Brown told his class that he would
reward the class if students worked hard for a week. Below is a chart
of the class data. Should the students use the mean or the median to
encourage Mr. Brown to reward the class? Explain your reasoning.
Day
Number of Students
Completing Work
13
15
18
26
27
Monday
Tuesday
Wednesday
Thursday
Friday
20. Anna’s class wants to go outside during lunch on Friday, but if the
average temperature is 50°F or lower then they will have to eat inside.
Is mean or median the best measure of central tendency to plead
their case? Explain your choice.
Day
Monday
Tuesday
Wednesday
Thursday
Friday
21. If Karen’s test scores are over 90 she will be allowed to go to the
dance. Is the mean or median the best measure of central tendency
to support her position that she may go? Explain your choice.
Test
1
2
3
4
5
Score
95
84
92
91
83
22. The store manager promised to sell a television for the typical price.
To get the best deal, is mean or median the best measure of central
tendency? Explain your reasoning.
$300
$325
$350
$375
$400
$425
Prices for Televisions Sold in the Last Week
374 Unit 6 • Data Analysis
$450
© 2014 College Board. All rights reserved.
Temperature (°F)
49
50
53
60
48
Lesson 29-1
Range
Activity 29
continued
My Notes
LESSON 29-1 PRACTICE
8. Construct viable arguments. Consider the dot plot for the
amount of time in minutes that students spent to take a history test.
10
20
30
40
Length of Time to Finish Test (in minutes)
a . What is the range for this set of data?
b. What is the shape of this distribution?
c. Which measure of center would be best to us in this situation?
9. Matthew’s class also did the “Take a Snapshot” survey. Below is the
data set for the number of minutes it took students to get ready for
school. What is the range for this set of data?
52
5
12
8
48
25
22
10
20
50
30
20
24
15
25
30
43
30
35
48
78
30
48
35
10. Here is the data set for the seventh grade homework times. What is
the range for this set of data?
40
42
Seventh Grade Homework Times (in minutes)
45 52 42 47 48 42 56 44 57
40 44 44 49 55 44 50 60 47
45
© 2014 College Board. All rights reserved.
11. Here is the data set for the eighth grade homework times. What is
the range for this set of data?
Eighth Grade Homework Times (in minutes)
60
64
65
60
62
64
62
58
60
40
56
64
55
62
62
50
58
60
57
57
45
12. The student’s in Jon’s class have the following heights.
52
54
56
58
60
62
Heights of Students
a . What is the range for this set of data?
b. What is the shape of this distribution?
c. Which measure of center would be best to use in this situation?
Activity 29 • Measures of Variability 381