STATISTICAL QUESTIONS
Is this a statistical question?
How many movies did you watch last weekend?
No.
It asks for one person's answer.
What is a frequency?
The number of times a value or group of values occurs.
Find the mean:
5, 10, 15
10
What are the five-number summary values used to create a box plot?
Minimum, Q1, Median, Q3, and Maximum
What does MAD stand for?
Mean Absolute Deviation
Is this a statistical question?
How many amusement parks has a typical middle school student visited?
Answer: Yes.
Answers will vary from student to student.
A survey asks students how many movies they watched last weekend.
Data:
1, 2, 1, 0, 4, 3, 1, 2, 0, 3
How many students watched 0–1 movies?
5 students
Find the median:
17, 13, 29, 21, 47
21
What does the line inside the box represent?
mean
What are the steps to find MAD
1) find mean
2) subtract mean from values
3) find mean from step 2
Is this a statistical question?
How high is the roller coaster?
Answer: No.
Using the same data, how many students watched 2–3 movies?
Data:
1, 2, 1, 0, 4, 3, 1, 2, 0, 3
4 students
Find the mean:
5, 11, 6, 7, 9, 4
7
What does Q1 represent?
Team A has a MAD of 15.
Team B has a MAD of 8.
Which team has more variation?
A larger MAD means the data values are more spread out.
Is this a statistical question?
How many pets does the average 6th grader have?
Yes, we would get a variety of answers from our class.
A class collected these numbers of cans:
15, 49, 37, 22, 42, 23, 13, 31, 12, 39
How many values belong in the interval 15–29?
3 cans
Find the median:
8, 3, 12, 5, 9
8
A box plot has:
Lower extreme = 15
Q1 = 20
Median = 35
Q3 = 50
Upper extreme = 60
What is the IQR?
30
Question:
Find the MAD of:
4, 6, 8, 4, 5
4.6
What makes a question a statistical question?
It expects different answers from a group of people or measurements and involves collecting data.
A class collected these numbers of cans:
15, 49, 37, 22, 42, 23, 13, 31, 12, 39
How many values belong in the interval 30-44?
4 cans
Trevon recorded these shooting distances:
16, 12, 13, 11, 11, 12
What is the median?
12
A data set has:
Q1 = 12
Q3 = 27
What is the IQR?
15
Find Mean Absolute Deviation of
46, 58, 50, 53, 48, 57
4