HW5_skeleton

7.1

• 1. Probaility density function
• 2. model
• 3. true
• 4. the area under the curve to the left of the mean
• 5. mean - standard deviation/mean + standard deviation
• 6. probability/frecuency
• 25. mu = 2, sigma = 3
• 26. mu = 5, sigma = 2
• 27. mu = 100, sigma = 15
• 28. mu = 530, sigma = 100
• 33 parts a and b are done for you. But please take a second and look at it!

shadenorm(mu=3400, sig=505, between=c(4410, 6000),col = "blue",dens = 150)

3. 1. 2.28% of all full term babies have a birth weight of more than 4,410 grams.

2. The probability is 0.0228 that the birth weight of a randomly chosen baby is more than 4,410 grams

1. 1. The proportion of pregnancies that last more than 280 days is 0.1908.

2. The probability that a randomly selected pregancy lasts more than 280 days is 0.1908

2. 1. The proportion of pregnancies that last between 230 and 260 days is 0.3416.

2. The probability that a randomly selected pregnancy lasts between 230 and 260 days is 0.3416