Definitions
Data Characteristics
Visualize It
Center
Variation
100
the smallest numbers that can belong to different classes
What are lower class limits?
100
The average value of the data set
What is a mean?
100
A graph made from relative frequency representing pieces of a whole
What is a pie chart?
100
The value that occurs most frequently
What is mode?
100
Difference between highest value and lowest value in a data set.
What is range?
200
the middle of a class
What is a class midpoint?
200
A representative value that indicates where the middle of the data set is located.
What is center?
200
A plot where the values are organized and split numerically into certain categories
What is a stem and leaf plot?
200
The character representing the average value of a set of sample values
What is X bar?
200
A measure of variation of all values from the mean
What is Standard deviation?
300
Numbers used to separate classes
What are class boundaries?
300
The nature or shape of the distribution of the data
What is distribution?
300
A bar graph in which the horizontal scales represent the classes of data values and the vertical scale represents the frequencies.
What is a histogram?
300
The middle value of a data set when the data is in numeric order.
What is median.
300
SD=Range/4
What is the range rule of thumb?
400
lists data values along with their corresponding counts
What is a frequency distribution?
400
Sample values that fall very far away from the vast majority of other sample values.
What are outliers?
400
Uses line segments connected to points directly above class midpoint values
What is a frequency polygon?
400
The character representing the average value for an entire population.
What is mu?
400
Unusual values are this far away from the mean.
What is 2 standard deviations?
500
the difference between either two consecutive lower class limits or two consecutive upper class limits.
What is class width?
500
A measure of the amount that the data values vary among themselves
What is variation?
500
A bar graph organizing bars from biggest to smallest
What is a pareto chart?
500
The value midway between the highest and the lowest values in original data.
What is midrange?
500
States that 99.7% of all scores are within 3 standard deviations of the mean.
What is the empirical rule?
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