Statistical Sciences 2035 Lecture Notes - Standard Deviation, Statistical Parameter, Confidence Interval
1 Mar 2014
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Document Summary
Chapter 7 estimation of population means m. We now move into a statistical topic called statistical inference the goal of inference is to draw conclusions (make inferences) about a population from a sample often, we are interested in obtaining information about m (and sometimes s ) The mean tar content of a certain brand of cigarette. The mean lifetime of a newly developed steel-belted radial tire. The mean gas mileage of a new model car. The mean height of male uwo undergraduate students. Inference about (section 7. 1) m from a normal population, where s is known. A large hospital wishes to estimate the average length of time patients remain in the hospital. The hospital"s administrators randomly select the records of 49 previous patients and calculate x to be 4. 53 days. Previous research on this subject has shown s = 3. 68 days and that the lengths of stay are normally distributed.
