Unit 5 Stat

Population Mean

Sample Mean

Weighted Mean

Combined Population Mean

Combined Sample Mean

Odd Median

Even Median

Percentiles

Approximating Value for Percentiles for Small Data Sizes

Steps to Calculating Quartiles

Median

Q1

Q3

4 Measures of Absolute Dispersion

(1) Range

(2) Inter-Quartile Range

(3) Standard Deviation

(4) Variance

2 Measures of Relative Dispersion

(1) Coefficient of Variation

(2) Z-Score

Formula for Range

Range = Max — Min

Formula for IQR

IQR = Q3 — Q1

Formula for Population Standard Deviation

Formula for Sample Standard Deviation

Formula for Population Variance

Formula for Sample Variance

Population and Sample Coefficient of Variation

What is Z-Score?

The number of standard deviations away from the mean.

Population and Sample Formula for Z-Score

Pearson’s First Coefficient of Skewness

Pearson’s Second Coefficient of Skewness

Interpretations for Skewness

7 Number Summary

Max

Min

Median

Q1

Q3

FL

FU

What does a box plot look like?

Properties of the Mean

Add, Subtract, Multiply, Divide the Mean

Properties of Std Dev

Multiply, Divide Std Dev