Find the area under the standard normal curve to the left of 0.3

0.32730.47130.56310.382None of the above

Question 2(Essay Worth 1 points)

Using your calculator, find the proportion of observations from a standard normal distribution that satisfies the following statement. Sketch the normal curve and shade the area under the curve that is the answer to the question (do this on scratch paper and provide a one-sentence description for the assignment). -1.5 < Z < 0.8

Question 3(Essay Worth 1 points)

The Graduate Record Examinations are widely used to help predict the performance of applicants to graduate schools. The range of possible scores on a GRE is 200 to 900. The psychology department at a university finds that the scores of its applicants on the quantitative GRE are approximately normal with mean = 544 and standard deviation = 103. Use your calculator or computer to find the relative frequency of applicants whose score X satisfies the following conditions: (As part of your answer, draw a standard normal curve and shade the area under the curve that represented the answer to the question; do this on scratch paper and provide a one-sentence description for the assignment). X < 500

Question 4(Essay Worth 1 points)

A pop machine at school has a mean daily gross income of $120 with a standard deviation of $30. Assume that the daily gross income is normally distributed. If a randomly selected day has a gross income of $70, then how many standard deviations away from the mean is that days gross income?