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MATH 1040 REVIEW (EXAM I)
www.math.utah.eduREVIEW (EXAM I) Chapter 1 1. For the studies described, identify the population, sample, population parameters, and sample statistics: a) The Gallup Organization conducted a poll of 1003 Americans in its household panel to determine what percentage of people plan to cancel their summer vacation because of the increase in gasoline prices.
SAMPLE STATISTICS
www.le.ac.uksample points. Examples are the sample mean ¯x = x i/n and the sample variance s2 = (x i − ¯x)2/n A random sample may be regarded as a microcosm of the population from which it is drawn. Therefore, we might attempt to estimate the moments of the population’s p.d.f f(x) by the corresponding moments of the sample statistics.