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STATISTICS FINAL WGU
ACADEMY (100% VERIFIED) A+
SCORE ASSURED
Question : nominal variables
Correct answer: Categorical variables that there is no
natural order among the categories
Question : ordinal variable
Correct answer: Categorical variables where there is
natural order among the categories (low-high)
Question : interval
Correct answer: A measurement which makes sense to
talk about the difference between values but not the ratio between values
Question : ratio
Correct answer: Quantitive variables where is makes
sense to talk about the difference in ratios. (Income, weight)
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Question : In ratios:
Correct answer: Value 0 means the absence of quantity
(income $0)
Question : Distribution of a Variable
Correct answer: Tells us what values the variables take
and how often they take those values
Question : In intervals:
Correct answer: Vale 0 does not mean the absence of
value (temp = 0F)
Question : Pie charts
Correct answer: Emphasize how the different categories
relate to the whole
Question : Bar charts
Correct answer: Emphasize how the different categories
compare with each other
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Question : Histogram
Correct answer: Breaking the range of values into
intervals and count how many observations fall into interval.
Question : Stemplot(stem and leaf plot)
Correct answer: Graphical display of quantitive data. Data
is spread into "stem" and "leaf". It retains the data and sorts.
Question : Boxplot
Correct answer: Graphically represents the distribution of
a quantitive variable. Visually displays the five number summary and the observations classified as a suspected outlier.
Question : Measures of Center
Correct answer: Mode, mean, and median.
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Question : Mode
Correct answer: The most commonly occurring value.
Can be unimodal or bimodal
Question : Mean
Correct answer: The average of a set of observations.
The sum of observations divided by the number of observations. (x bar)
Question : Median
Correct answer: The midpoint of the distribution. (M)
Question : Measures of soread
Correct answer: Range, inter quartile range (IQR),
standard deviation
Question : How to find the median
Correct answer: -order the data smallest to largest
-if the number(n) of observations is odd (n+1)/2nd spot