1. Assume that z-scores are normally distributed with a mean of 0 and a standard deviation of 1. If P(1.2b. b= (Round to two decimal places.)

2. For a standard normal distribution, given: P(z

3. A manufacturer knows that their items have a normally distributed length, with a mean of 19.9 inches, and standard deviation of 5.9 inches. If one item is chosen at random, what is the probability that it is less than 35 inches long? (Round to four decimal places.)