Question 3c(ii)

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The question in our own words · page 22

The wait at the traffic light is normal with mean \(2.5\) minutes. Find the standard deviation \(\sigma\) that makes the chance of waiting longer than \(3.5\) minutes exactly \(2\%\). Give \(\sigma\) to two decimal places.

Source: VCAA 2025 VCE Mathematical Methods Examination 2, Section B, Question 3c(ii)

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