Summarize and Compare Responses Mean (Average) Median Standard Deviation Mean (Average) Median ...

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Summarize and Compare Responses
Summarize and Compare Responses
Mean (Average) Median Standard Deviation
Mean (Average) Median Standard Deviation
16, 23, 25, 17, 26, 24, 11, 24, 19, 21, 15, 13, 21, 21, 20, 20, 21, 28, 18, 17, 17, 22, 20, 10, 22, 23, 16, 22, 20, 21, 21, 21, 31, 17, 21, 16, 16, 20, 18, 22, 18, 22, 22, 16, 21, 17, 25, 20, 21, 26
Hypothetical: David Archuleta releases a CDHypothetical: David Archuleta releases a CD
50 CD buyers, chosen at random. Asked their age.
50 CD buyers, chosen at random. Asked their age.
16, 23, 25, 17, 26, 24, 11, 24, 19, 21, 15, 13, 21, 21, 20, 20, 21, 28, 18, 17, 17, 22, 20, 10, 22, 23, 16, 22, 20, 21, 21, 21, 31, 17, 21, 16, 16, 20, 18, 22, 18, 22, 22, 16, 21, 17, 25, 20, 21, 26
Hypothetical: David Archuleta releases a CDHypothetical: David Archuleta releases a CD
50 CD buyers, chosen at random. Asked their age.
50 CD buyers, chosen at random. Asked their age.
Mean = 20.1 yearsMedian = 21.0 yearsStandard Deviation = 4.1 years
Frequency Table
Age (years) # of Sales10 111 112 013 114 015 116 517 518 319 120 621 1022 623 224 225 226 227 028 129 030 031 1
Frequency Histogram
50 responses
1000 responses
2000 responses
3000 responses
4000 responses
5000 responses
6000 responses
Bell Shaped Pattern
Gaussian (Normal) Distribution
Peaked & Symmetric
2 Inflection Points
“Spread” in ResponsesStandard Deviation
68.3% of Total Area
CD Sales in Missouri
Different Mean & Std. Dev.
Still 68.3% of Total Area
Skewed Distribution
Skewed Distribution
Utah Sales
Missouri Sales