VOCAB
Range- Find by this equation: maximum value - minimum value
Mode- Whichever data entry is occurring most frequently
Median- Find by arranging raw data in ascending order, then finding the middle number.
If there is an even number of entries, find the 2 middle numbers’ sum and divide by 2 for
the median.
Mean- Average. Find by adding all entries, then dividing by the total number of entries
Percentile- Score to base all entries above or below of. Find by adding all values below
the given score/percentile, and dividing by total values.
Class intervals- The width of each group (or “bin”) when you make a frequency table or
histogram. Find by first choosing how many classes to divide your values into. Typically,
this is between 5-20 depending on the size of the set, unless the question specifies. Then,
divide the range by the number of classes to find the width.
Frequency- Total number of all data value sets within the class interval.
Relative Frequency- Find by dividing class frequency by the total sum of all
frequencies.
Cumulative frequency- Find by adding all the frequencies together.
Class boundary- The highest and lowest class range added and subtracted by .5. For
example, if the class range is 10-19, then the class boundary is 9.5-19.5
Class Width- Range divided by total number of classes
Class limit- The largest number a value can be within a class. For example, if the class
range is 10-19, then the class limit is 19.
Range- Find by this equation: maximum value - minimum value
Mode- Whichever data entry is occurring most frequently
Median- Find by arranging raw data in ascending order, then finding the middle number.
If there is an even number of entries, find the 2 middle numbers’ sum and divide by 2 for
the median.
Mean- Average. Find by adding all entries, then dividing by the total number of entries
Percentile- Score to base all entries above or below of. Find by adding all values below
the given score/percentile, and dividing by total values.
Class intervals- The width of each group (or “bin”) when you make a frequency table or
histogram. Find by first choosing how many classes to divide your values into. Typically,
this is between 5-20 depending on the size of the set, unless the question specifies. Then,
divide the range by the number of classes to find the width.
Frequency- Total number of all data value sets within the class interval.
Relative Frequency- Find by dividing class frequency by the total sum of all
frequencies.
Cumulative frequency- Find by adding all the frequencies together.
Class boundary- The highest and lowest class range added and subtracted by .5. For
example, if the class range is 10-19, then the class boundary is 9.5-19.5
Class Width- Range divided by total number of classes
Class limit- The largest number a value can be within a class. For example, if the class
range is 10-19, then the class limit is 19.
