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For Questions , use the following narrative
Narrative: cell phone owners
Suppose numerous random samples of size 2,500 are taken from a population made up of 20% cell phone owners.
-{Cell phone owners narrative} Suppose your sample size was only 250.What range of proportions of cell phone owners is reasonable to expect from this population? Justify your answer
Sampling Error
The discrepancy between a sample statistic and the actual population parameter, which arises purely by chance from random sampling.
Confidence Interval
A variety of numerical values, sourced from sample measurements, that is believed to include the value of a not-yet-known population attribute.
Population Mean
The average value of all the members of a set or population.
Probability
The determination of the odds that an event will happen, shown as a number from 0 to 1.
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