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20 Cards in this Set

  • Front
  • Back
Independent Variable
Something that causes change
Dependent Variable
Something that changes because of the Independent Variable
The complete collection of all elements being studied
Subcollection of members selected from a population
Numerical measurements describing some characteristics of the population
Numerical measurement describing some characteristic of the sample
Nominal Level of Measurement
Data that consist of names, label, categories only.

Ex: Yes, no, undecided..... colors
Interval Level of Measurement
Names, labels, but difference between two categories is meaningful. No natural starting point

Ex: Temperature, Years
Ratio Level of Measurement
Meaningful difference, natural zero starting point

Ex: weights, prices
Ordinal Level of Measurement
Can be arranged in some order, but differences are meaningless (cannot be subtracted from each other0

EX: Grades, ranks
Lower class limits
Smallest numbers that can belong to each class (sample results)
Upper class limits
Largest numbers that can belong to each class (sample results)
Class Boundaries
Size of the gap between Upper Limit of one class and Lower Limit of the next. Add 1/2 that to each Upper Limit to find Upper Class Boundaries. Subtract 1/2 that to find Lower Class Boundaries.
Class Midpoints
Add Lower class limits to Upper class limits and divide by 2.
Class width
Difference between 2 consecutive Lower class limits or Upper class limits.
Data values arranged in order, then find middle. If even number of values, median is the mean of both middle numbers
Most often repeated
Add highest to lowest and divide by 2.
Distance between highest and lowest number
Standard Deviation
Measure of variation of values about the mean