STAT 235 LABRATORY

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STAT 235 LABRATORY

• Laboratory 1
• --- Displaying and Describing Distributions

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Experiment Design Analysis

• Purpose Read the background information
  carefully to catch the purpose.
• Inference Make inferences only if the sample is
  able to represent the population.
• Repeat To accurate the measurements, usually we
  repeat measuring the subject several times, maybe
  in different levels.

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Frequency Histogram

• PRE-ERROR Pre-Cali---Weight
• Bins Start at -2700 and end at 5300 with width
  1000
• Title and Labels X and Y axes labels
• Comments Skewness, center and spread
• Overestimate vs. Underestimate EX0
• Overestimate Mostly Xigt0
• Underestimate Mostly Xilt0

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Descriptive Statistics

• Center Mean and Median
• Spread Standard Deviation and Interquartile
  range---(IQRQ3-Q1)
• Which and Why Skewness or not
• Quartile First and Third quartile
• Five Number Summary
• Min, Q1, Median, Q3, and Max

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Scatter Plot

• Scatter Plot POST-ERROR vs. Weight
• Comments Pattern and outliers
• Conclusion Recalibrate or not?

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Questions

• Do You Have Any Questions?
• Follow the Lab Instructions, Try Yourself.
• Due Date Friday, Feb. 2, by 1000 PM
• Good Luck and Have Fun!