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Math 120 Exam 1 Questions with Verified Correct Answers

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Math 120 Exam 1 Questions with Verified Correct Answers

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Math 120 Exam 1 Questions with Verified
Correct Answers
Population

all subjects about whom we would like to make a statement

population data

data collected from all subjects in the population under study

sample

a subset of the population

sample size

the number of individuals in a sample

parameter

a value of interest computed based on population data

statistic

a value of interest computed based on sample data

variable

characteristic/ trait that may vary among subjects

qualitative variable

nominal &ordinal variables

quantitative variable

discrete & continuous

, ordinal

if there is a clear ordering of the categories; categorical

ex: size of a pizza

nominal

if there is NOT a clear ordering of the categories; categorical

ex: type of fruit

discrete

if the variables can only take particular values in an interval; quantitative

ex: goals scored... 1, 2, 3...

continuous

if the variables can take on any value in any interval; quantitative

ex: height of penguins... 29.2in, 24 in, etc

range formula

maximum value - minimum value

median

value that lies in the middle of the data when arranged in ascending order

IQR

the range of the middle 50% of the observations in a data set

IQR formula

Q3-Q1

how to find Q1

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