Mean
How do you determine what number you divide by when calculating mean?
The total number of values in the dataset
2, 4, 4, 5, 6, 7, 7, 7, 8
6
Each section of a box and whisker plot represents what percentage of the data?
25%
Find the MODE:
4, 5, 2, 3, 2, 4, 7, 6, 4, 1, 8
4
You are at a chocolate-lovers convention and ask 100 people what their favorite flavor of cake is.
Biased Sample
2, 3, 6, 9
5
How do you find the median of a dataset with an even amount of values?
Take the average of the center 2 values.
What is the formula for Interquartile Range?
Q3-Q1
Find the RANGE:
4, 5, 2, 3, 2, 4, 7, 6, 4, 1, 8
7
At random, you ask 10 students who enter a classroom if they completed their homework.
Unbiased
4, 6, 15, 10, 5
8
3, 4, 5, 9
4.5
The IQR represents what percentage of the data?
50%
Find the MODE:
4, 14, 6, 0, 0.25, 6.25, 0.25, 16, 0.16, 14
0.25, 14
A surveyor randomly selects 100 phone numbers to call out of the phonebook to ask how they feel about social media.
Unbiased
18, 22, 40, 21, 24, 11
22.67
10, 14, 12, 18, 22, 10, 11
12
Find the Range:
Minimum = 16
Q1 = 17
Median= 20
Q3 = 22
Maximum = 29
13
Find the RANGE:
8 ,1.25, 1.75, 9, 1.75, 10, 10.66, 12, 13, 9, 7.25
11.75
You ask 20 students their favorite color. 8 respond blue. If you asked 100 students ,how many would you predict would respond blue?
40
104, 98, 88.6, 91.4, 112, 100
99
17, 27, 77, 57, 7, 37, 67, 47
42
Find the Interquartile Range:
Minimum = 57
Q1 = 60
Median= 66.75
Q3 = 72.5
Maximum = 74
12.5
Find the MODE and RANGE:
100, 90, 75, 90, 101, 80, 108, 80, 100, 90, 85, 72
MODE= 90
RANGE= 36
In a survey of 35 people, 5 said that their favorite board game is Candy Land. If 210 people were surveyed, how many people would you predict would respond with Candy Land?
30