This is my question:

2 Which of the following statements about the normal distribution is not true?

(a) The curve approaches, but never touches the x-axis as it extends farther and farther from the mean. (b) The curve is bell-shaped and symmetric about the median.

(c) About 98% of the data lies within two standard deviations of the mean.

(d) The mean, median and mode are all very close to equal.

(e) The area under the curve is 1.

3 The commuting time for a student to travel from home to a college campus is normally distributed with a mean of 35 minutes and a standard deviation of 5 minutes. What is the probability that the commuting time for a randomly selected student is less than 40 minutes?

(a) 0.16 (b) 0.32 (c) 0.50 (d) 0.68 (e) 0.84

4 At our college, the scores on the chemistry final exam are approximately normally distributed, with a mean of 75 and a standard deviation of 10. The scores on the calculus final are also approximately normally distributed, with a mean of 78 and a standard deviation of 8. A student scored 82 on the chemistry final and an 82 on the calculus final. Relative to the students in each respective class, in which subject did the student do better? (a) The student did better in chemistry.

(b) The student did better in calculus.

(c) The student did equally well in each course.

(d) There is not enough information for comparison.