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STAT 302 final exam Study Guide
Solutions
population - ANSWER✔✔-the entire group the researcher is interested in
sample - ANSWER✔✔-the group of people we actually collect data on
parameter - ANSWER✔✔-a numerical summary of the entire population
ex: mean, proportion
statistic - ANSWER✔✔-a numerical summary of only the sample
variable - ANSWER✔✔-a characteristic of an individual (must vary from individual to individual)
categorical variable - ANSWER✔✔-a variable that places an individual into one of several groups
quantitative variable - ANSWER✔✔-a variable measuring amount or quantity
distribution - ANSWER✔✔-the values a variable takes along with their frequencies
normal distribution - ANSWER✔✔-
left-skewed distribution - ANSWER✔✔-
bimodal distribution - ANSWER✔✔-
uniform distribution - ANSWER✔✔-
average - ANSWER✔✔-mean
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, Copyright © KAYLIN 2024/2025 ACADEMIC YEAR. ALL RIGHTS RESERVED FIRST PUBLISH NOVEMBER, 2024
Xbar = sigmaX/n
median - ANSWER✔✔-middle number (after ordering)
resistant - ANSWER✔✔-not strongly influenced by extreme values like outliers
influential - ANSWER✔✔-noticeably shifts the value of a statistic like the sample mean
range - ANSWER✔✔-max-min
measures spread, ignores values of data points, not robust
IQR - ANSWER✔✔-Q3-Q1
the range of the middle 50% of data, measures spread, is robust
standard deviation - ANSWER✔✔-typical distance from mean, measures spread, not robust
association - ANSWER✔✔-particular values of one variable more likely to occur with certain values of
another
independent - ANSWER✔✔-zero association
P(A and B) = P(A)P(B)
P(A | B) = P(A)
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STAT 302 final exam Study Guide
Solutions
population - ANSWER✔✔-the entire group the researcher is interested in
sample - ANSWER✔✔-the group of people we actually collect data on
parameter - ANSWER✔✔-a numerical summary of the entire population
ex: mean, proportion
statistic - ANSWER✔✔-a numerical summary of only the sample
variable - ANSWER✔✔-a characteristic of an individual (must vary from individual to individual)
categorical variable - ANSWER✔✔-a variable that places an individual into one of several groups
quantitative variable - ANSWER✔✔-a variable measuring amount or quantity
distribution - ANSWER✔✔-the values a variable takes along with their frequencies
normal distribution - ANSWER✔✔-
left-skewed distribution - ANSWER✔✔-
bimodal distribution - ANSWER✔✔-
uniform distribution - ANSWER✔✔-
average - ANSWER✔✔-mean
Copyright ©Stuvia International BV 2010-2024 Page 1/8
, Copyright © KAYLIN 2024/2025 ACADEMIC YEAR. ALL RIGHTS RESERVED FIRST PUBLISH NOVEMBER, 2024
Xbar = sigmaX/n
median - ANSWER✔✔-middle number (after ordering)
resistant - ANSWER✔✔-not strongly influenced by extreme values like outliers
influential - ANSWER✔✔-noticeably shifts the value of a statistic like the sample mean
range - ANSWER✔✔-max-min
measures spread, ignores values of data points, not robust
IQR - ANSWER✔✔-Q3-Q1
the range of the middle 50% of data, measures spread, is robust
standard deviation - ANSWER✔✔-typical distance from mean, measures spread, not robust
association - ANSWER✔✔-particular values of one variable more likely to occur with certain values of
another
independent - ANSWER✔✔-zero association
P(A and B) = P(A)P(B)
P(A | B) = P(A)
Copyright ©Stuvia International BV 2010-2024 Page 2/8
