Class mark is the class midpoint. Class size is the difference of upper and lower limit.
Add the marks together and then divide the sum by total number of subjects.
Observe the intervals carefully.
data that is collected by someone other than the user
Think of the definition of all the frequencies given in the options.
The size of the shoes can only take certain values.
The most common measures of central tendency are the arithmetic mean, the median, and the mode.
The difference of the upper limit and the lower limit.
This is the most used type of frequency distribution.
Difference of the upper and lower imit.
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