Dot Plot
Histogram
Box and Whisker
Distributions
Mean, Median, Mode, Range
100
The dot plot shows the quiz scores of students is Ms. Tidwell's 1st period class. Based on this dot plot, what is the mean and median of the data?
Mean = 7.75
Median = 8
100
How many people have more than 18 pairs of shoes?
4+1 = 5
100
What is the Q1 of the data set?
3 hours
100
What is the range of the data?
9
100
The data set below shows the number of free throws made by the high school basketball team during last season’s games.
8, 12, 5, 8, 4, 13, 9, 8, 5, 6, 8
What is the range of the data?
Range = 9
200
9 pets
200
What is the mean number of students?
Can not calculate the mean without the exact data.
200
What percent of people are 13 or older?
75%
Each segment of the box and whisker plot is 25%
200
Are there any Outliers? If so, where?
Yes, 7
200
Lisa surveyed her friends to see how many minutes they had to read yesterday to finish their book. The results are in this list:
35, 20, 15, 20, 45, 24
What is the average of the data?
The mean is 26.5
300
How What percent of students scored 90% or higher?
62.5%
300
How many students were asked about the number of pets they have?
27
300
What is the 5 number summary?
2~3~6~8~10
300
What is the Distribution of the Data set?
skewed left or right
Skewed right
300
Find the median of this data set:
13, 2, 4, 8, 4, 1, 16, 12, 4, 8
Median: 6
400
What is the Median grade?
87.5%
400
At what interval is there a gap?
9-12
400
What is the IQR?
IQR = 3-1.5
IQR = 1.5
400
Are there any gaps? If so, where?
Yes, 6-8
400
What would be the better measure of center (mean or median) to use to summarize the data below:
4, 3, 5, 6, 2, 3, 27
MEDIAN!
Outliers mess with data points. 27 is an outlier, so the mean would not accurately reflect most of the data.
500
Mode = 18
Range = 11
500
Is the data symmetric, skewed right, or skewed left
Skewed right
500
True or False: Tamika's minimum is lower than Cari's minimum.
True
500
Which measure of center is affected the most by an outlier?
Mean
500
Find the range and interquartile range (IQR) of the following data set:
17, 18, 13, 15, 12, 11, 35, 18, 14
2. Which measures spread best represent the data in #1? Explain
1. mean = 17; median = 15; range = 24; IQR = 5.5
2. Answers may vary. Since the outlier (35) affects the mean and range, the median and IQR probably best represent the data