A window producer claims that its window wings operate $($opening or closing$)20,000$ times before it has to be maintained. You are interested in validating this claim before ordering these windows for a huge development project. A test of $120$ windows yields an average of $19,695$ operations $($opening or closing$)$ with a standard deviation of $1,103.$

a$)$ Formulate the appropriate null and alternative hypotheses.

 

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The null hypothesis H0 and the alternative hypothesis H1 are two key components in hypothesis testin... View the full answer