Suppose 27% of all small businesses are owned by a particular group of people. In a random sample of 300 small businesses, let x be the number owned by that group. 1. Find the mean of x. 2. Find the standard deviation of x. 3. Find the z-score for the value x = 99.5. 4. Find the approximate probability that, in a sample of 300, x is 100 or more. a. The mean of x is about b. The standard deviation of x is about (Round to three decimal places as needed.) c. The z-score is about (Round to two decimal places as needed.) d. The probability is approximately (Round to four decimal places as needed.)