BIOSTATISTICS
Calculating Descriptive Statistics: Measures of Central Tendency

Outline
Descriptive Statistics, Statistics & Parameters
Central Tendency
Old Hat: Mean, Median and Mode
Using Excel to Measure Central Tendency
Mean vs. Median vs. Mode - When to Use?
Statistical Notation
Weighted Mean
Data Collection for Central Tendency and Dispersion


In the Future
(meaning?)
An Overview


Mean, Median and Mode?
Exam Grades Raw Data
Symmetrical & Skewed Distributions
Kurtosis
A Bit of Notation Mice & the Weighted Mean Weighted Notation
GPA Anyone?

Index vs. Middle - Are they different?
Grab a Ruler
data/descriptive stats
/histogram
snapshot of 2-sample & paired t-test