ST 311: Avoiding an accident while driving can depend on reaction time. That time, measured from the time the driver first sees the danger until the driver gets his/her foot on the brake pedal, can be described by a normal model with mean1.9seconds and standard deviation0.2seconds.Use the 68-95-99.7 rule(NOT a z table) to answer the following questions. The pictures of the 68-95-99.7 rule atthis linkmight help.

1) What percentage of drivers have a reaction time more than2.3seconds?

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2) What percentage of drivers have a reaction time less than1.7seconds?

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3) What percentage of drivers have a reaction time less than2.1seconds?

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