The Times of First Sprinkler Activation for a Series of Tests

question 28

Essay

The times of first sprinkler activation for a series of tests with fire prevention sprinkler systems using an aqueous film-forming were (in sec). $\begin{array} { l l l l l l l l l l l l l } 28 & 42 & 23 & 28 & 24 & 36 & 31 & 34 & 25 & 28 & 29 & 23 & 25\end{array}$ The system has been designed so that "true" average activation time is at most 25 sec under such conditions. Does the data strongly contradict the validity of this design specification? Test the relevant hypotheses at significance level .05 using the P-value approach.

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Definitions:

Financial Futures

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S&P 500 Index

An index tracking the performance of 500 major US companies listed on the stock exchanges.

New York Stock Exchange Index

An indicator that shows the performance of all stocks listed on the New York Stock Exchange.

Wheat Futures

Contracts that specify the future delivery of a certain amount of wheat at a predetermined price.