Sketch a normal curve with the following parameters. (For part (a) through part (d), select the correct graph.)(a) mean of 15 and standard deviation of 2

(b) mean of 15 and standard deviation of 3 (c) mean of 12 and standard deviation of 2

(d) mean of 12 and standard deviation of 3

(e) Consider two normal curves. If the first one has a larger mean than the second one, must it have a larger standard deviation as well? Explain your answer.

No. The values ofandare independent.No. Asincreases,will decrease. Yes. Asincreases,must also increase.Yes. The values ofandare independent.