Find the value of the test statistic

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Reference no: EM133265331

A contracting company claims that the proportion of the indicator lights on the road that are still working after 5 years is at least 90%; if a previous test of 100 indicators showed that the proportion that is still working after 5 years is 83%, with a significance level of 5%.

a) Find the value of the test statistic.

b) What is the p-value?

c) Should the contractor's claim of at least 90% working after 5 years be rejected?

Reference no: EM133265331

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