Suppose that a random sample of n 1000 personal

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Unformatted text preview: . Suppose that a random sample of n= 1000 personal computer (PC) sales is monitored and the type of microprocessor installed is ˆ recorded. Let p be the proportion of personal computers with a Pentium microprocessor in the sample. Question: What is the probability that the proportion of the sample PCs with Pentium micro-processors was between 75% and 80%? Answer: Statistical Inference Numerical descriptive measures calculated from the population are called parameters For quantitative variables, the population is described by mean (location parameter) μ and standard deviation (scale parameter) σ For a binomial population, location and scale are described by the population proportion p If the values of the parameters are unknown we make inference on them based on sampled measurements Types of inference: estimation, hypothesis testing Estimation Estimating or predicting the value of a parameter based on sampled data Point estimation Interval estimation Example : Given the data what...
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This note was uploaded on 12/05/2012 for the course STA 13 taught by Professor Samaniego during the Fall '10 term at UC Davis.

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