MATH 146 OL, Spring 2022, EXAM 1 NAME: #3. The distribution of weights of newborn babies is bell-shaped, with a mean of 106 ounces and a standard deviation of 18 ounces. Using the empirical rule, what is the approximate percentage of: a. (2 pts) newborn babies weighing between 70 and 142 ounces? 106 b. (2 pts) newborn babies weighing less than 124 ounces? 10 0 c. (2 pts) newborn babies weighing more than 160 ounces? #4. Given that a population has a mean weight of 180 pounds and a standard deviation of 22.0 pounds, find the following: a. (2 pts) Find the z-score for a weight of 235 pounds x- 235 235- 180 - 2.5 M = 180 22.0 . 0 = 22- 6 b. (2 pts) Is the weight of 235 pounds be considered "unusual"? Explain. No . c. (2 pts) Find the weight that has a z-score of -1