X-bar is representative of the sample whereas μ is representative of the population. The sample mean is used as a point estimate to determine the population mean. Hence it is the population mean of the dataset.Ĭ) X-bar and μ are the sample statistic and population parameters respectively. 57).ĭescribe in your own words what your calculation is doing and what the answer means.ī) μ represents the population parameter. Open R, and manually enter those numbers and their corresponding probabilities to calculate the mean using only addition and multiplication (in other words, enter only the numbers, the plus sign, and the * for multiplication, like on the bottom of Yakir, 2011, p. Minorsky)ī) What does the Greek letter mu (μ) represent as it was used in this week's lessons?Ĭ) What is the difference between x-bar and mu?Ī) Many people already know how to find the mean (average) of a sample of data by "adding all the numbers and dividing by the number of values in the dataset." Read Chapter 4, and then describe, in your own words, another method of finding the mean by using the sample space (list of possible values) and probabilities (the technique is in the book).Ĭreate a list of seven, 2-digit numbers (with no duplicates) and another set of seven probabilities (with no duplicates).
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