BIOL 2060 Lecture 4: Chapter 4
1 Feb 2019
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Document Summary
Sample mean, y - used to estimate the true mean, (mu), of the population. Sample standard deviation, - used to estimate the population standard deviation. Sample proportion, p (p-hat) - an estimate of the population portion p. Sampling distribution - probability distribution of all the variables for an estimate that we might have obtained when we sample the population. Parameter - quantities that describe the population: different samples will generate different estimates of the same parameter. If we are able to repeat sampling an infinite number of times, we could create the probability distribution of our estimate: sampling distributions repeats the population of values for an estimate. It is not a real population; imaginary population of values for an estimate. Confidence interval - common way of quantifying uncertainty about the value of the parameter. 95% confidence interval for the mean - this confidence interval is a range likely to contain the value of the true population mean, .
