QUESTION 1 Which of the following variable(s) are categorical? Letter grade of s

Question

QUESTION 1 Which of the following variable(s) are categorical?

Letter grade of students (e.g. A­, B+, B, B+, C, A, A­, ...)

Location of retail stores (e.g. south, north, east, south, west, west, ...)

Weight of item produced (e.g. 200 grams, 190 grams, 205 grams, ...)

Average monthly household income (e.g. $2000, $1800, $3500, $2750, ...)

10 points Saved QUESTION

2 When a data set has a few outliers observations, I would prefer to use the following numerical measure to assess central tendency:

variance

median

weighted average

arithmetic average

QUESTION 3 In order to measure the amount of variability in a data set, I would use:

covariance

corelation

standard deviation

median

Explanation / Answer

1. In statistics, a categorical variable is a variable that can take on one of a limited, and usually fixed, number of possible values, assigning each individual or other unit of observation to a particular group or nominal category on the basis of some qualitative property

Letter grade of students (e.g. A­, B+, B, B+, C, A, A­, ...) Categorical

Location of retail stores (e.g. south, north, east, south, west, west, ...) Categorical

Weight of item produced (e.g. 200 grams, 190 grams, 205 grams, ...) Categorical

Average monthly household income (e.g. $2000, $1800, $3500, $2750, ...) Categorical

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