Box and whiskers
Measures of center
Measures of variability
statistical question
Diagrams
100
What number in a box-and-whisker plot divides the data set into two equal halves?
The median
100
What is the mean of 4, 6, and 8?
6
100
What measure of variability is found by subtracting the smallest value from the largest value?
The range
100
Is this a statistical question: “What is your favorite ice cream flavor?”
Trick question: yes, you can ask a full class of people what is your favorite ice cream?
100
Describe the data distribution
skewed left
200
In a box-and-whisker plot, what does the box represent?
The middle 50% of the data
200
What is the median of 3, 5, 7, 9, and 11?
7
200
Find the range of 3, 7, 9, 12, and 15.
12
200
Why is “How tall are the students in our class?” a statistical question?
Because different students will have different heights.
200
Describe the distribution
skewed right
300
What are the smallest and largest numbers in a box-and-whisker plot called?
The minimum and maximum
300
What is the mode of 2, 4, 4, 5, 6, 6, 6, and 8?
6
300
True or False: A data set with numbers close together has low variability.
true
300
What type of graph is best for showing how many times values occur using dots above a number line?
A dot plot
300
Describe the distribution
Symmetrical
400
The distance between the first quartile (Q1) and third quartile (Q3) is called what?
The interquartile range (IQR)
400
Find the mean of 10, 12, 14, and 20.
14
400
Which data set has the greater variability?
- Set A: 5, 5, 6, 6, 7
- Set B: 1, 5, 9, 13, 17
set b
400
What type of graph groups data into intervals or ranges?
A histogram
400
Describe the data distribution
Skewed right
500
A box-and-whisker plot has a minimum of 2, Q1 of 5, median of 8, Q3 of 12, and maximum of 15. What is the range?
13
500
A data set has the numbers 5, 7, 7, 9, 12. What are the median and mode?
Answer: Median = 7, Mode = 7
500
Why is variability important when analyzing data?
It shows how spread out the data is.
500
Write a statistical question about starburst candy?
answers may vary
500
If I collected every adults data around the world about their income and created a dot plot. What do you think the distribution would look like.
skewed right