Statistics Portage CNSL 503 Exam 2 Study
Guide.
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 i...
Frequency distribution - answer✔presents the frequency of every value in a dataset
frequency tables - answer✔displays 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? - answer✔one column represents the category,
the other column represents the frequency
absolute frequency - answer✔raw count
What type of frequency do you use when answering " how many student out of the total number of
students scored a letter grade?"? - answer✔relative frequency
relative frequency - answer✔the ratio between the absolute frequency of a category and the total
frequency
formula for relative frequency - answer✔frequency in category/total frequency
What type of frequency do you use when answering the question "how many students scored a B or
better?"? - answer✔cumulative frequency
cumulative frequency - answer✔the sum of frequencies of all preceding categories
Frequency tables can be used for what type of variables? - answer✔qualitative or quantitative variables
When using frequency tables for quantitative variables, group the quantitative scores into groups called
what? - answer✔bins
frequency graphs - answer✔pie charts, bar charts, histograms, frequency polygons, stem and leaf plots
What type of frequency graphs are used for qualitative variables? - answer✔pie charts and bar charts
What type of frequency graphs are used for quantitative variables? - answer✔histograms, frequency
polygons and stem and leaf plots
pie charts - answer✔displays relative frequencies (and not necessarily absolute frequencies) of each
category for qualitative variables in a pie
Each portion of a pie represents... - answer✔a different category
The size of each portion is proportional to... - answer✔the relative frequency of that category
The entire pie represents... - answer✔100% of the scores
Pie charts are good to visualize... - answer✔frequencies
Pie charts are only useful for... - answer✔small number of categories
bar charts/bar graphs - answer✔display absolute and relative frequencies of qualitative data using bars
Each bar represents a - answer✔category
The height of a bar represents... - answer✔the frequency
Do the bars touch in a bar graph? - answer✔no
histograms - answer✔displays absolute and relative frequencies of quantitative data using bars
Each bar represents... - answer✔a category
The height of the bar represents... - answer✔the freuqeuncy
Do the bars in a histogram touch? - answer✔yes
The width of the bars represent... - answer✔the size of the range of values
frequency polygons - answer✔display absolute and relative frequencies of quantitative data using dots
and lines
Each dot is placed... - answer✔above the score an the height of the frequency
The dots are connected with a line that begins and ends at... - answer✔zero frequency
stem and leaf plot - answer✔display frequencies of quantitative data, particularly when the dataset is
small
The stem represents... - answer✔the first digits of the score
The leaf consists of... - answer✔he last digit of the score
The length of the leaf represents... - answer✔the frequency of the category
3D graphs don't add any information when... - answer✔the data is 2D
3-dimensional graphs - answer✔use when data is measured on 3 different axis'
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