1. A class consists of 10 male and 30 female students. If one student is randomly selected from the class, what is the probability of selecting a female student? a. 10/30 b. 30/40 c. 1/10 d. 10/40 2. What proportion of a normal distribution is located between the mean and z = -.30? a. 0.0808 b. 0.4192 c. 0.1179 d. -0.4192 3. What is the probability of randomly selecting a z-score less than z = -1.25 from a normal distribution? a. 0.8944 b. 0.1234 c. 0.3944 d. 0.1056 4. A normal distribution has a mean of u = 100 with o = 20. If one score is randomly selected from this distribution, what is the probability that the score will be less than X = 84? a. 0.7881 b. 0.5762 c. 0.2881 d. 0.2119 5. John drives to work each morning, and the trip takes an average of u = 38 minutes. The distribution of driving times is approximately normal with a standard deviation of o = 5 minutes. For a randomly selected morning, what is the probability that John's drive to work will take less than 35 minutes? a. 0.6554 b. 0.3446 c. 0.7257 d. 0.2743