MATH 1131 Lecture Notes - Lecture 3: Central Tendency, Bloomsburg, Pennsylvania, Standard Deviation
19 Oct 2017
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Math 1131 lecture 3 notes- numerical summary measures. , xn: this refers to a set of fixed observations on a variable: the subscripts indicate the order in which the observations were selected, not magnitude. For example, x5 is the fifth observation drawn from a population, not the fifth largest. For example, the following notation is used to represent the sum of each squared observation: sum practice, suppose x1 = 5, x2 = 9, x3 = 12, x4 = 26, x5 = 17, and x6 = 22. In each case, i is the index of summation, 1 is the lower bound, and 6 is the upper bound: apply the definition of summation notation to each expression. a. In words, expression (a) says add all of the observations, and square the result: b. It describes the center of a fixed collection of data: there is no set rule to determine the number of included decimal places.
