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margin of error
The maximum expected diVerence between an estimate for a population characteristic and the actual value of the population characteristic.
midline
The value halfway between the maximum and minimum values of a period function. Also the horizontal line whose -coordinate is that value.
multiplicity
The power to which a factor occurs in the factored form of a polynomial. For example, in the polynomial , the factor has multiplicity 2 and the factor has multiplicity 1.
natural logarithm
The natural logarithm of , written , is the log to the base of . So it is the number that makes the equation true.
normal distribution
A speciSc distribution in statistics that is symmetric and bell-shaped, has an area of 1 between the -axis and the curve, and has the -axis as a horizontal asymptote.
observational study
An observational study collects data without inTuencing the subjects directly.
odd function
Afunctionwhosegraphistakentoitselfwhenyourotateit180 abouttheorigin.It satisSes for all inputs .
period
The length of an interval at which a periodic function repeats. A function has a period, , if for all inputs .
periodic function
A function whose values repeat at regular intervals. If a number , called the period, so that
is a periodic function then there is for all inputs .
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Algebra