9 Consumers spent an average of $15.30 on a meal at a restaurant in 2014. Assume that the amount spent on a restaurant meal is normally distributed...

6.9 Consumers spent an average of $15.30 on a meal at a restaurant in 2014. Assume that the amount spent on a restaurant meal is normally distributed and that the standard deviation is $2.

a. What is the probability that a randomly selected person spent more than $16?

b. What is the probability that a randomly selected person spent between $10 and $12?

c. Between what two values will the middle ninety-five percent of the amounts spent fall?

7.17

8.55

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