Examlex
The numbers 0 through 9 are to be used in code groups of four to identify an item of clothing. Code 1083 might identify a blue blouse, size medium. The code group 2031 might identify a pair of pants, size 18, and so on. Repetitions of numbers are not permitted, i.e., the same number cannot be used more than once in a total sequence. As examples, 2256, 2562 or 5559 would not be permitted. How many different code groups can be designed?
Confidence Interval
A range of values, derived from the sample data, that is believed, with a certain probability, to contain the true population parameter.
Population Mean
The average of all the individuals or items in a population, calculated as the sum divided by the total number in the population.
Degrees Of Freedom
The number of independent values or quantities which can vary in the analysis without violating any constraints.
Margin Of Error
An expression of the amount of random sampling error in a survey's results, which describes a confidence interval’s radius around a survey’s result within which the true population parameter lies.
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