DEFINITIONS
True or False:
To find the median, you need to arrange the data in ascending order.
True
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
A frequency polygon can be drawn in 2 ways. WITH or WITHOUT a _____________.
histogram
A data set is _________ if it has 3 modes.
trimodal
Phat purchased season tickets for 8 football games. The total 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
What type of data set is this according to the number of modes?
48, 42, 47, 57, 47, 41, 40, 48, 45
bimodal
Which graph uses the class midpoints on the x- axis?
(histogram, frequency polygon, ogive)
frequency polygon
_______ 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
Baitong sold 15 raffle tickets, BaKron sold 35, Guide sold 23, Aii sold 47, and Stung 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
Which graph uses the lower class boundaries on the x-axis?
(frequency polygon with a histogram, frequency polygon without a histogram, Less than Ogive, Greater than Ogive)
Greater than Ogive
To find the ________, we add up all values in the data set and then divide by the total frequenc.
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
The mean is also known as (a.k.a) ____________.
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