# Statistics: Skewness and College Grad

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• Published : March 9, 2013

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(Ch. 1-3)

True/False section.

F1.Any time there is a statistical association between events, we can assume there is causation.

T2.A binary variable is categorical data that can take only two values; for example: college grad = 1, not college grad = 0.

T3.Likert scales measure ordinal data with coding; the more scale points used, the coarser the scale.

T4.Characteristics of a population are called parameters; characteristics of a sample are called statistics.

T5.Of the seven sampling methods, only cluster sampling uses geographical areas as strata.

Problem section. Show all your work and uses only your own words (not words from the textbook)

A. Using the data below, create a scatter plot with EXCEL. Describe the relationship between the two variables (Unit Price and Units Sold) using the Figures on pp. 84-85. Unit Price: 5, 4, 6, 5.5, 6.25, 7

Units sold: 17, 16, 13, 17, 12, 10