< 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 Question 18 of 31 (1 point) | Attempt 1 of 1 | View question in a popup | 1h 5m Remaining 6.2 Section Exe Big Babies: A public health organization reports that 20% of baby boys 6 - 8 months old in the United States weigh more than 20 pounds. A sample of 15 babies is studied. Part 1 of 2 (a) What is the mean number who weigh more than 20 pounds in a sample of 15 babies aged 6 - 8 months? Round the answer to two decimal places. The mean number who weigh more than 20 pounds is Part 2 of 2 (b) What is the standard deviation of the number who weigh more than 20 pounds in a sample of 15 babies aged 6 - 8 months? Round the answer to four decimal places. The standard deviation of the number who weigh more than 20 pounds is