MATH 120 EXAM 1 QUESTION AND ANSWERS
Population CORRECT ANSWERS✓✓all subjects about whom we would like to make a statement
population data CORRECT ANSWERS✓✓data collected from all subjects in the population under study
sample CORRECT ANSWERS✓✓a subset of the population
sample size CORRECT ANSWERS✓✓the number of individuals in a sample
parameter CORRECT ANSWERS✓✓a value of interest computed based on population data
statistic CORRECT ANSWERS✓✓a value of interest computed based on sample data
variable CORRECT ANSWERS✓✓characteristic/ trait that may vary among subjects
qualitative variable CORRECT ANSWERS✓✓nominal &ordinal variables
quantitative variable CORRECT ANSWERS✓✓discrete & continuous
ordinal CORRECT ANSWERS✓✓if there is a clear ordering of the categories; categorical
ex: size of a pizza
nominal CORRECT ANSWERS✓✓if there is NOT a clear ordering of the categories; categorical
ex: type of fruit
discrete CORRECT ANSWERS✓✓if the variables can only take particular values in an interval;
quantitative
ex: goals scored... 1, 2, 3...
, continuous CORRECT ANSWERS✓✓if the variables can take on any value in any interval; quantitative
ex: height of penguins... 29.2in, 24 in, etc
range formula CORRECT ANSWERS✓✓maximum value - minimum value
median CORRECT ANSWERS✓✓value that lies in the middle of the data when arranged in ascending
order
IQR CORRECT ANSWERS✓✓the range of the middle 50% of the observations in a data set
IQR formula CORRECT ANSWERS✓✓Q3-Q1
how to find Q1 CORRECT ANSWERS✓✓median of the bottom half
how to find Q3 CORRECT ANSWERS✓✓median of the top half
lower fence outlier formula CORRECT ANSWERS✓✓Q1 - 1.5 (IQR)
upper fence outlier formula CORRECT ANSWERS✓✓Q3 + 1.5 (IQR)
mean CORRECT ANSWERS✓✓average value
standard deviation CORRECT ANSWERS✓✓roughly the average distance that values fall from the mean
low standard deviation CORRECT ANSWERS✓✓data is tightly clustered around the mean
high standard deviation CORRECT ANSWERS✓✓data is loosely spread over a range of values
Population CORRECT ANSWERS✓✓all subjects about whom we would like to make a statement
population data CORRECT ANSWERS✓✓data collected from all subjects in the population under study
sample CORRECT ANSWERS✓✓a subset of the population
sample size CORRECT ANSWERS✓✓the number of individuals in a sample
parameter CORRECT ANSWERS✓✓a value of interest computed based on population data
statistic CORRECT ANSWERS✓✓a value of interest computed based on sample data
variable CORRECT ANSWERS✓✓characteristic/ trait that may vary among subjects
qualitative variable CORRECT ANSWERS✓✓nominal &ordinal variables
quantitative variable CORRECT ANSWERS✓✓discrete & continuous
ordinal CORRECT ANSWERS✓✓if there is a clear ordering of the categories; categorical
ex: size of a pizza
nominal CORRECT ANSWERS✓✓if there is NOT a clear ordering of the categories; categorical
ex: type of fruit
discrete CORRECT ANSWERS✓✓if the variables can only take particular values in an interval;
quantitative
ex: goals scored... 1, 2, 3...
, continuous CORRECT ANSWERS✓✓if the variables can take on any value in any interval; quantitative
ex: height of penguins... 29.2in, 24 in, etc
range formula CORRECT ANSWERS✓✓maximum value - minimum value
median CORRECT ANSWERS✓✓value that lies in the middle of the data when arranged in ascending
order
IQR CORRECT ANSWERS✓✓the range of the middle 50% of the observations in a data set
IQR formula CORRECT ANSWERS✓✓Q3-Q1
how to find Q1 CORRECT ANSWERS✓✓median of the bottom half
how to find Q3 CORRECT ANSWERS✓✓median of the top half
lower fence outlier formula CORRECT ANSWERS✓✓Q1 - 1.5 (IQR)
upper fence outlier formula CORRECT ANSWERS✓✓Q3 + 1.5 (IQR)
mean CORRECT ANSWERS✓✓average value
standard deviation CORRECT ANSWERS✓✓roughly the average distance that values fall from the mean
low standard deviation CORRECT ANSWERS✓✓data is tightly clustered around the mean
high standard deviation CORRECT ANSWERS✓✓data is loosely spread over a range of values
