Answer and show solution

Choose the best answer(Multiple Choices) 1. Determine P(-1

Choose the best answer(Multiple Choices) 1. Determine P(-l < z < 1.2) a. 0.7262 c. 0.3849 b. 0.3413 d. 0.7622 2. What is the area under the curve to the left of 1.54 a. 0.3421 b. 0.9832 c. 0.9382 d. 0.9823 3. The score on a Standardised Achievement Test follow a normal distribution with a mean of 42 and a standard deviation of 3. Find the probability that a score will be between 36 and 45. a. 88.15% c. 85.51 b. 81.15 c. 81.85% 4. About how many percent of the distribution lies between 2 units standard deviations from the mean. a. 68% b. 950/0 c. 99.70/0 d. The answer cannot be determined 5. Sixty-eight percent of the scores under the normal curve lies between how many standard deviations from the mean. a. + _ positive-negative 1 sd b. + 2 sd d. + 4 sd