ch9-2x3 - 9-1 Hypothesis Testing 9-1.1 Statistical...

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3/23/2009 1 9-1 Hypothesis Testing 9-1.1 Statistical Hypotheses Statistical hypothesis testing and confidence interval estimation of parameters are the fundamental methods used at the data analysis stage of a comparative experiment in which the engineer is interested for Definition experiment, in which the engineer is interested, for example, in comparing the mean of a population to a specified value. 9-1 Hypothesis Testing 9-1.1 Statistical Hypotheses For example, suppose that we are interested in the burning rate of a solid propellant used to power aircrew escape systems. Now burning rate is a random variable that can be described by a probability distribution. Suppose that our interest focuses on the mean burning rate (a parameter of this distribution). Specifically, we are interested in deciding whether or not the mean burning rate is 50 centimeters per second. 9-1 Hypothesis Testing 9-1.1 Statistical Hypotheses null hypothesis alternative hypothesis Two-sided Alternative Hypothesis One-sided Alternative Hypotheses
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