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Intro to Statistics: Variables, Bar Charts/Histograms, Central Tendency, Variability, Boxplots, Distributions, Z-Scores, Correlation
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What is the mode of these numbers?
4 6 4 2 3 5 8 3 4 1
What is the mode of these numbers?
4 6 4 2 3 5 8 3 4 1
4
(The mode is the number with the largest frequency: the number 4 occurs most frequently (3 times))
Is the Mean, Median, or Mode sensitive to outliers?
Is the Mean, Median, or Mode sensitive to outliers?
The Mean
(Median and Mode are not influenced by outliers)
How are outliers defined in a box plot?
How are outliers defined in a box plot?
Upper fence: Q3 + 1.5*IQR and Lower fence: Q1 – 1.5*IQR
In what distribution does the Mean = Median = Mode?
In what distribution does the Mean = Median = Mode?
A normal distribution
What is powerful about a Z score?
What is powerful about a Z score?
You can use the Z score to identify where a single value appears within a data set without knowing the rest of the data set
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