1. MTB Step 3 - Descriptive Statistics Flashcards
Cards Complete: Day 1 - 5/1/2019 * Day 2 - 5/3/2019 * Day 3 - 5/11/2019 * Day 4 - 5/31/2019 Day 5 - 6/30/2019
DESCRIPTIVE STATISTICS:
Mode
The most frequently appearing measurement in a set of data points.
- i.e., 1, 2, 3, 4, 8, 8, 8, 20, 100. In this set, the mode is 8
DESCRIPTIVE STATISTICS:
Mean
The average of all the data points.
- i.e., 1, 2, 3, 4, 8, 8, 8, 20, 100 the mean is 17
DESCRIPTIVE STATISTICS:
Median
The data point halfway between the highest and lowest in the collection of measurements.
- i.e., 1, 2, 3, 4, 8, 8, 8, 20, 100 the median is 8
DESCRIPTIVE STATISTICS:
Range
The numerical distance between the highest value and the lowest.
- i.e., 1, 2, 3, 4, 8, 8, 8, 20, 100 the range is from 1 to 100.
DESCRIPTIVE STATISTICS:
Mode, Median, and Mean for a Normal Distribution
Mode = Median = Mode
DESCRIPTIVE STATISTICS:
Mode, Median, and Mean for a Positively/Right-side “Skewed” Distribution.
Mode, Median, and Mean for a Negatively/Left-side “Skewed” Distribution.
Positive Skew: Mode < Median < Mean:
- i.e., 1, 2, 3, 4, 8, 8, 8, 20, 100 is positively “skewed” (skewed to the right) because the single outlier at 100 extends the range of the data set out to the right.
Negative Skew: Mean < Median < Mode:
- i.e., 1, 80, 92, 92, 92, 97, 98, 99, 100 s negatively “skewed” (skewed to the left) because the single outlier at 1 extends the range of the data set out to the left.