7.1
- probability density function
- model
- T
- 1/2
- x= mu-sigma and x= mu+sigma
- proportion/probability
- mu = 2, sigma = 3
- mu = 5, sigma = 2
- mu = 100, sigma = 15
- 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)

- (i)the proportion of birth weights of full-term babies more than 4410 grams is 0.0228 (ii)the probability that a randomly selected birth weights of full-term babies more than 4410 grams is 0.0228
- the proportion of human pregnancies that lasts more than 280 days is 0.1908
- the probability that a randomly selected human pregnancies that lasts more than 280 days is 0.1908
- the proportion of human pregnancies that lasts between 230 and 260 days is 0.3416
- the probability that a randomly selected human pregnancies that lasts between 230 and 260 days is 0.3416