perryjarvisr3322 perryjarvisr3322 12-06-2024 Mathematics Answered If the population mean is 300 and the population standard deviation is 20, using the empirical rule about what percentage of the observations lie Between 280 and 320 ?a. About 16 or 16%b. About 68 or 68%c. About 50 %.d. About 025 or 2.5%