©JOSHCLAY 2024/2025. YEAR PUBLISHED, 2024.
General ed Math 115 Exam Questions
and Answers 100% Solved | Graded A+
population - ✔✔everything that is being studied (ex. all math115
students fall 2023)
sample - ✔✔small portion of population
random samples - ✔✔obtained via random methods (random number
generator, coin, dice, etc)
systematic samples - ✔✔every kth person (ex. every 3rd person)
stratified samples - ✔✔divide into groups (ex. freshmen and
sophomores) (ex. age groups 18-24, 24-32, etc)
cluster samples - ✔✔intact groups (ex. just our class out of all 240
math115 students)
frequency distribution - ✔✔write out all the data, then the frequency
which that data number occured
histogram - ✔✔bar graph, bars touch
frequency polygon - ✔✔dots for each piece of data connected with a line
, ©JOSHCLAY 2024/2025. YEAR PUBLISHED, 2024.
stem and leaf plot - ✔✔graphing by placing the "stem" digits (or initial
digits) in one column and the "leaf" digits (or remaining digits) out to the
right.
grouped frequency distribution - ✔✔scores are grouped into intervals
rather than listed as individual values.
midrange - ✔✔low value + high value divided by 2
position of the median (formula) - ✔✔(n+1)/2
what are and aren't affected by outliers - ✔✔mean and midrange are,
median and mode arent
standard deviation (definition and formula) - ✔✔average deviations from
the mean
create a chart for the formula!!
x= data value
n= number of total data
normal distribution/bell curve - ✔✔a symmetrical distribution with values
clustered around a central, mean value
68-95-99.7 rule - ✔✔68% fall 1 SD of the mean
95% fall 2 SDs of the mean
99.7% fall 3 SDs of the mean
General ed Math 115 Exam Questions
and Answers 100% Solved | Graded A+
population - ✔✔everything that is being studied (ex. all math115
students fall 2023)
sample - ✔✔small portion of population
random samples - ✔✔obtained via random methods (random number
generator, coin, dice, etc)
systematic samples - ✔✔every kth person (ex. every 3rd person)
stratified samples - ✔✔divide into groups (ex. freshmen and
sophomores) (ex. age groups 18-24, 24-32, etc)
cluster samples - ✔✔intact groups (ex. just our class out of all 240
math115 students)
frequency distribution - ✔✔write out all the data, then the frequency
which that data number occured
histogram - ✔✔bar graph, bars touch
frequency polygon - ✔✔dots for each piece of data connected with a line
, ©JOSHCLAY 2024/2025. YEAR PUBLISHED, 2024.
stem and leaf plot - ✔✔graphing by placing the "stem" digits (or initial
digits) in one column and the "leaf" digits (or remaining digits) out to the
right.
grouped frequency distribution - ✔✔scores are grouped into intervals
rather than listed as individual values.
midrange - ✔✔low value + high value divided by 2
position of the median (formula) - ✔✔(n+1)/2
what are and aren't affected by outliers - ✔✔mean and midrange are,
median and mode arent
standard deviation (definition and formula) - ✔✔average deviations from
the mean
create a chart for the formula!!
x= data value
n= number of total data
normal distribution/bell curve - ✔✔a symmetrical distribution with values
clustered around a central, mean value
68-95-99.7 rule - ✔✔68% fall 1 SD of the mean
95% fall 2 SDs of the mean
99.7% fall 3 SDs of the mean
