STATISTICS PORTAGE CNSL 503
EXAM 2 QUESTIONS AND ANSWERS
LATEST UPDATED
frequency distribution - ANSWERpresents the frequency of every value in a dataset
frequency tables - ANSWERdisplays the number of times (ex: frequency) a certain
value appears within the dataset in a table format
What does each column represent in frequency tables? - ANSWERone column
represents the category, the other column represents the frequency
absolute frequency - ANSWERraw count
What type of frequency do you use when answering " how many student out of the total
number of students scored a letter grade?"? - ANSWERrelative frequency
relative frequency - ANSWERthe ratio between the absolute frequency of a category
and the total frequency
formula for relative frequency - ANSWERfrequency in category/total frequency
What type of frequency do you use when answering the question "how many students
scored a B or better?"? - ANSWERcumulative frequency
cumulative frequency - ANSWERthe sum of frequencies of all preceding categories
Frequency tables can be used for what type of variables? - ANSWERqualitative or
quantitative variables
When using frequency tables for quantitative variables, group the quantitative scores
into groups called what? - ANSWERbins
frequency graphs - ANSWERpie charts, bar charts, histograms, frequency polygons,
stem and leaf plots
What type of frequency graphs are used for qualitative variables? - ANSWERpie charts
and bar charts
What type of frequency graphs are used for quantitative variables? -
ANSWERhistograms, frequency polygons and stem and leaf plots
, pie charts - ANSWERdisplays relative frequencies (and not necessarily absolute
frequencies) of each category for qualitative variables in a pie
Each portion of a pie represents... - ANSWERa different category
The size of each portion is proportional to... - ANSWERthe relative frequency of that
category
The entire pie represents... - ANSWER100% of the scores
Pie charts are good to visualize... - ANSWERfrequencies
Pie charts are only useful for... - ANSWERsmall number of categories
bar charts/bar graphs - ANSWERdisplay absolute and relative frequencies of qualitative
data using bars
Each bar represents a - ANSWERcategory
The height of a bar represents... - ANSWERthe frequency
Do the bars touch in a bar graph? - ANSWERno
histograms - ANSWERdisplays absolute and relative frequencies of quantitative data
using bars
Each bar represents... - ANSWERa category
The height of the bar represents... - ANSWERthe freuqeuncy
Do the bars in a histogram touch? - ANSWERyes
The width of the bars represent... - ANSWERthe size of the range of values
frequency polygons - ANSWERdisplay absolute and relative frequencies of quantitative
data using dots and lines
Each dot is placed... - ANSWERabove the score an the height of the frequency
The dots are connected with a line that begins and ends at... - ANSWERzero frequency
stem and leaf plot - ANSWERdisplay frequencies of quantitative data, particularly when
the dataset is small
The stem represents... - ANSWERthe first digits of the score
EXAM 2 QUESTIONS AND ANSWERS
LATEST UPDATED
frequency distribution - ANSWERpresents the frequency of every value in a dataset
frequency tables - ANSWERdisplays the number of times (ex: frequency) a certain
value appears within the dataset in a table format
What does each column represent in frequency tables? - ANSWERone column
represents the category, the other column represents the frequency
absolute frequency - ANSWERraw count
What type of frequency do you use when answering " how many student out of the total
number of students scored a letter grade?"? - ANSWERrelative frequency
relative frequency - ANSWERthe ratio between the absolute frequency of a category
and the total frequency
formula for relative frequency - ANSWERfrequency in category/total frequency
What type of frequency do you use when answering the question "how many students
scored a B or better?"? - ANSWERcumulative frequency
cumulative frequency - ANSWERthe sum of frequencies of all preceding categories
Frequency tables can be used for what type of variables? - ANSWERqualitative or
quantitative variables
When using frequency tables for quantitative variables, group the quantitative scores
into groups called what? - ANSWERbins
frequency graphs - ANSWERpie charts, bar charts, histograms, frequency polygons,
stem and leaf plots
What type of frequency graphs are used for qualitative variables? - ANSWERpie charts
and bar charts
What type of frequency graphs are used for quantitative variables? -
ANSWERhistograms, frequency polygons and stem and leaf plots
, pie charts - ANSWERdisplays relative frequencies (and not necessarily absolute
frequencies) of each category for qualitative variables in a pie
Each portion of a pie represents... - ANSWERa different category
The size of each portion is proportional to... - ANSWERthe relative frequency of that
category
The entire pie represents... - ANSWER100% of the scores
Pie charts are good to visualize... - ANSWERfrequencies
Pie charts are only useful for... - ANSWERsmall number of categories
bar charts/bar graphs - ANSWERdisplay absolute and relative frequencies of qualitative
data using bars
Each bar represents a - ANSWERcategory
The height of a bar represents... - ANSWERthe frequency
Do the bars touch in a bar graph? - ANSWERno
histograms - ANSWERdisplays absolute and relative frequencies of quantitative data
using bars
Each bar represents... - ANSWERa category
The height of the bar represents... - ANSWERthe freuqeuncy
Do the bars in a histogram touch? - ANSWERyes
The width of the bars represent... - ANSWERthe size of the range of values
frequency polygons - ANSWERdisplay absolute and relative frequencies of quantitative
data using dots and lines
Each dot is placed... - ANSWERabove the score an the height of the frequency
The dots are connected with a line that begins and ends at... - ANSWERzero frequency
stem and leaf plot - ANSWERdisplay frequencies of quantitative data, particularly when
the dataset is small
The stem represents... - ANSWERthe first digits of the score
