1.1 STATISTICS

STATISTICS!!! The science of data

What is data? ,[object Object],[object Object]

Statistics in Science ,[object Object],[object Object]

2 types of Data ,[object Object],[object Object]

Qualitative Data ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Qualitative data, manipulated numerically ,[object Object]

Quantitative data ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Quantitation ,[object Object]

Quantitation = Measurement ,[object Object],[object Object],[object Object],[object Object]

How to determine uncertainty? ,[object Object],[object Object]

Finding the limits ,[object Object],[object Object],[object Object]

Looking at Data ,[object Object],[object Object]

Comparing Averages ,[object Object]

Drawing error bars ,[object Object]

Average value Value farthest from average Calculated distance

What do error bars suggest? ,[object Object]

Quick Review – 3 measures of “ Central Tendency ” ,[object Object],[object Object],[object Object]

How can leaf lengths be displayed graphically?

Simply measure the lengths of each and plot how many are of each length

If smoothed, the histogram data assumes this shape

This Shape? ,[object Object],[object Object]

Standard deviation ,[object Object],[object Object]

A typical standard distribution curve

According to this curve: ,[object Object],[object Object]

Three Standard Deviations? ,[object Object],-3sd -2sd +/-1sd 2sd +3sd

How is Standard Deviation calculated? ,[object Object]

AGHHH! Ms. Pati ,[object Object]

Not the formula! ,[object Object],[object Object],[object Object]

You DO need to know the concept! ,[object Object],[object Object],[object Object]

THE END ,[object Object],[object Object]

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