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MAT 202 Statistics Super Study Guide with 100- correct answers
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MAT 202 Statistics Super Study Guide with 100- correct answers
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MAT 202Statistics Super
Study Guide with
100% correct
answers
individual - answer particular person/object, unit,
ie marathon runners
variable - answer particular characteristic of the
individual, ie
dataset - answer a set of data identified with
particular circumstances. Typically displayed in
tables with rows as the individuals and columns as
the variables
sample size - answer number of indiviudals
,quantitative variable - answer represents a
measurement or count, answering "how much" or
"how many"
ie. time waiting in line, temperature, income,
height
categorical variable - answer represent labels or
ranks and places/classifies an individual into one of
several groups
ie eye color, social status, right/left handed,
"strongly agree" to "strongly disagree"
Can be represented numerically (1, 2)
nominal variable - answer categorical variables
where there is no natural order among the
categories (eye color)
ordinal variable - answer categorical variable
where there is a natural order among the
categories ie socioeconomic status (high, medium,
low)
what are the two types of categorical variables? -
answer nominal and ordinal
,what are the two types of quantitative variables? -
answer interval and ratio
interval variable - answer represent a
measure/count for which it makes sense to talk
about the DIFFERENCE between values but it does
not make sense to talk about the ratio
ie temperature
ratio variable - answer quantitative variable for
which it makes sense to talk about the difference
but also the ratio has intrinsic meaning
ie income, weight, time
distribution - answer what values the variable
takes and how often the variable takes those
values
a pie chart is used to show - answer how the
different categories relate to the whole
a bar graph is used to show - answer how the
different categories compare to each other
histogram - answer a bar graph depicting a
frequency distribution
, what is used to interpret a histogram? - answer
shape, center, spread (the pattern) and outliers
(deviation from the pattern)
shape - answer symmetry/skewedness of
distribution
peakedness (modality) or number of peaks (modes)
types of symmetrical distributions - answer
unimodal (one peak)
bimodal (two peaks), more than 2 multimodal
uniform (no peaks)
right skewed distribution - answer A density curve
where the right side of the distribution extends in
a long tail; (mean > median)
left skewed distribution - answer A density curve
where the left side of the distribution extends in a
long tail
median - answer center of distribution (M)
if n is even, it is between the 2 at the center ie 3, 5
M=4
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