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Ch. 5 The Normal Curve
•
•
Comparing histograms to the normal
curve
Interpretation of SDs and areas
Standardized Units
•
Converting to
standardized units:
1.
2.
•
Find the deviation from
the mean
Calculate the number of
SDs the deviation is
Example: The average
age of the laid off
salaried employees is
48.6 years and the
standard deviation is
12.9 years. Convert 55
years to standard units.
deviation from mean
z
SD
Activity: Hand Span
• Get into groups of 5-6 people
• Each group should complete one handout
and hand it in when finished
Area Under the Normal Curve
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Area between -1 & 1
Area between -2 & 2
Area between 0 & 1
Area between 0 & 2
Area between -2 & 0
Area between 1 & 2
• Area between -1.5 & 1.5
• Area between 0 & 1.5
• Area between 1 & 1.5
• Example Set B p. 84