Measure of Center
Stem-and-Leaf Plots
Define
Histograms
Misc.
100
What is a cluster? What is a gap?
Teacher determines
100
How many plants were measured?
There 12 plants measured.
100
Mean
What is average?
100
What type of graph is a histogram?
Bar graph
100
Find the Mean.
2, 4, 5, 6, 2, 3, 1, 1
3
200
How must data be organized before you can find the median?
in order from least to greatest
200
What is the difference between the fastest and shortest time?
The difference is 3.8 seconds
200
Median
Middle
200
What are the three shapes of a graph?
Left Skewed, Right Skewed, and Symmetrical
200
Find the median.
5, 7, 10, 3, 6, 7, 2
6
300
What is variability?
Teacher determines
300
How many plants are less than 40 cm in height?
There are 7 plants that are less than 90 centimeters in height.
300
What are data values that are either much greater or much less than the other data values?
Outliers
300
true or false:
In a histogram the numerical information is always groups in intervals.
True
300
Find the range.
4, 10, 17, 22, 30
26
400
What is the dependent variable?
y values
400
How many numbers were recorded in the stem- and- leaf plot?
There are 16 numbers recorded in the stem- and- leaf plot.
400
What type of bar graph that shows both continuous data (all parts touch)
What is a Histogram?
400
How does a bar graph and a histogram differ?
Histograms have intervals.
400
Find the mode.
2, 8, 4, 2, 7, 4, 9, 10, 4, 16
4
500
Find the mean:
1, 3, 5, 7, 2, 6
4
500
What is the median length of Serena's pencils?
The median length of Serena's pencils is 4 3/4 inches.
500
What gives a better representation of a data set, range or interquartile range?
IQR
500
How many students are represented in this graph?
17
500
If a bar graph is skewed left, the mean is ______ greater than the median.
sometimes, never, or always
never