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

1
Q

DESCRIPTIVE STATISTICS:

Mode

A

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
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2
Q

DESCRIPTIVE STATISTICS:

Mean

A

The average of all the data points.

  • i.e., 1, 2, 3, 4, 8, 8, 8, 20, 100 the mean is 17
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3
Q

DESCRIPTIVE STATISTICS:

Median

A

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
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4
Q

DESCRIPTIVE STATISTICS:

Range

A

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.
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5
Q

DESCRIPTIVE STATISTICS:

Mode, Median, and Mean for a Normal Distribution

A

Mode = Median = Mode

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6
Q

DESCRIPTIVE STATISTICS:

Mode, Median, and Mean for a Positively/Right-side “Skewed” Distribution.

Mode, Median, and Mean for a Negatively/Left-side “Skewed” Distribution.

A

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.
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