3/23/200919-1 Hypothesis Testing9-1.1 Statistical HypothesesStatistical hypothesis testing and confidence interval estimation of parameters are the fundamental methods used at the data analysis stage of a comparative experimentin which the engineer is interested forDefinitionexperiment, in which the engineer is interested, for example, in comparing the mean of a population to a specified value.9-1 Hypothesis Testing9-1.1 Statistical HypothesesFor 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 meanburning 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 Testing9-1.1 Statistical Hypothesesnull hypothesisalternative hypothesisTwo-sided Alternative HypothesisOne-sided Alternative Hypotheses
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