Describe that Distribution
Measures of Center
Measures of Variability
Histograms
Boxplots
Find some stats!
Make some stats!
100
Describe the Distribution
Bell-Shaped and Symmetric
100
Which Measure of Center represents the most reoccuring data value in a data set?
Mode
100
Which Dot Plot has a higher standard deviation? top or bottom?
The Top because the data is more spread out from the mean.
100
Which interval or bin has only 2 states?
1.75-2.00 percent
100
Half the trees have more branches and half the trees have less branches than what number of branches?
10 branches, because 10 is the median.
100
What are the MAXIMUM and MINIMUM values of the dataset?
3, 8, 6, 12, 17, 2, 7, 18, 24, 10
Min = 2
Max = 24
100
Make a 5-point dataset with a median of 8.
Example: 2,4,8,9,10
200
Describe the Distribution
Uniform and Symmetric
200
Which Measure of Center represents the half way point of a dataset?
The Median.
200
Which dot plot has more variability in its data? Top or Bottom?
Top has more variability because the data is more spread out.
200
What is the total number of states represented here?
13 states
200
What is Quartile 1?
7
200
Find the MEAN of the dataset:
4, 2, 6, 2, 4, 6, 9, 13, 2, 9
Mean = 5.7
200
What is the most sigma measure of spread?
Standard deviation
300
Describe the Distribution.
Skewed-Left
300
Which will be greater, the mean or the median?
Neither, they are equal because it is symmetric.
300
Which dot plot has a higher standard deviation? 
Bottom, Because the more data values are further from the mean than the one on top.
300
What is the mode of this data set?
Can't tell from a histogram
300
75% of the tree have fewer than what number of branches?
Most trees have fewer than 14 branches, because 14 is Q3.
300
Find the MEDIAN of the dataset:
4, 14, 14, 15, 8, 8, 9, 10, 11, 11
median = 10.5
300
Make a 5-point dataset with a mean of 10.
Example: 5, 10, 20, 3, 12
400
Skewed-Right
400
What clade of dinosaurs included big scary dinosaurs like tyrannosaurus, carnotaurus, spinosaurus, allosaurus, and giganotosaurus?
OPTIONS: theropoda, sauropoda, thyreophora, marginocephalia
THEROPODA
400
What's the range of each box plot?
8
400
What two values is Q1 between?
1.75 and 2.00
400
How many trees were studied?
Not enough information. You can not see all the individual data points on a boxplot.
400
Find the mean, median, mode and range of the dataset:
6, 7, 14, 4, 7, 8, 7, 3
mean = 7
median = 7
mode = 7
range = 14 - 3 = 11
400
What is the most sigma measure of center?
Mean
500
Bimodal
500
If there are outliers in the data, is the mean (Average) or the median (middle) more representative of the data?
Median, because it is resistant to outliers.
500
Which measure(s) of variability can we get from looking at a box plot? 
IQR, range
500
Is this histogram representing quantitative or categorical data?
Quantitative
500
What is the IQR of the boxplot?
IQR = 14 - 7 = 7. There is low variability amongst the trees.
500
Find the quartiles and the the IQR of the dataset:
2, 6, 20, 14, 11, 3, 15, 18, 18, 7
Q1 = 6
Q3 = 18
IQR = 12
500
Make a 5-point dataset with a median of 10 and a mean of 8.
Example: 7, 7, 8, 8, 20