DEFINITIONS
True or False:
To find the mean, you need to arrange the data in ascending order.
False
Find the mean.
13, 18, 13, 14, 13, 16, 14, 21, 13
15
Find the median.
5, 3, 10, 13, 8, 18, 5, 17, 2, 7, 9, 10, 4, 1
7.5
Find the mode/modes.
65, 59, 60, 55, 56, 70, 61, 61, 65, 56, 53, 65
65
The value in the data set that occurs or appears the most is the ______.
mode
Boom purchased season tickets for 8 football games. The cost was $176. What is the average price per game?
$22
What is the position of the median in this data set?
12, 13, 13, 15, 10, 11, 11, 11, 10, 9
5.5th or 5.5
Given 4, 6, 8, 10, 12, 10, 10, 8, 12, 12 — identify the modal values.
Bimodal: 10 and 12
_______ is the middle value in the data set arranged in ascending order.
median
Given: 4, 3, 4.5, 6, x, 7.3, 9.5, 10, 2.1, 11.5
What should be the value of x so that the mean of this data set is 6.6?
8.1
Ron sold 15 raffle tickets, Jan sold 35, Claudia sold 23, Nathan sold 47, and Erin sold 23, What was the median number of tickets sold?
23 tickets
What is the mode in this ungrouped data?
Number of Pets Frequency
1 4
2 3
3 2
4 1
5 2
6 1
7 1
8 1
1
To get the ________, we add up all values in the data set and then divide by the number of values (or total frequency).
mean
Find the mean of this ungrouped data.
Number of Pets Frequency
1 4
2 3
3 2
4 1
5 2
6 1
7 1
8 1
3.4
What is the lower boundary of the median class of this grouped data?
Classes Frequency
1-10 2
11-20 7
21-30 10
31-40 3
41-50 1
19.5
Which class is the modal class?
Test Score Frequency
16-20 2
21-25 7
26-30 14
31-35 8
36-40 8
41-45 1
26-30
What is the other name for mean?
average
Find the mean of this grouped data.
Classes Frequency
1-10 2
11-20 7
21-30 10
31-40 3
41-50 1
22.89
Find the median of this grouped data.
Classes Frequency
1-10 2
11-20 7
21-30 10
31-40 3
41-50 1
22
Find the mode of this grouped data.
Test Score Frequency
16-20 2
21-25 7
26-30 14
31-35 8
36-40 8
41-45 1
28.19