Question 2 scores on an exam follow an approximately Normal?

Question 1.Scores on an exam follow an approximately Normal distribution with a mean of 76.4 and a standard deviation of 6.1 points. What percent of students scored above 80 points?

Question 2.Scores on an exam follow an approximately Normal distribution with a mean of 76.4 and a standard deviation of 6.1 points. What is the minimum score you would need to be in the top 10%?

Question 3. The bus you take every morning always arrives anywhere from 2 minutes early to 15 minutes late andit is equally likely that it arrives during any of those minutes. Suppose that you arrive at the bus stop five minutes early. What is the probability that the bus is more than 15 minutes late?

Question 4.X~N(145, 13). Find the z-score corresponding to an observation of 150

Question 5. Scores on an exam follow an approximately Normal distribution with a mean of 76.4 and a standard deviation of 6.1 points. What percent of students scored below 85 points?

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