HW5_skeleton

7.1

• 1. probability density function
• 2. Model
• 3. True
• 4. the area under the curve to the left of mu, which is 1/2
• 5. X=mu-sigma, X=mu+signma
• 6. the proportion of the population with the characteristic described by the interval of values or the probability that a randomly selected individual from the population will have the characteristic described by interval of values
• 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. 2.28% of all full-term babies have a birth weight of at least 4410 grams. The probability is .0228 that the birth weight of a randomly chosen full term baby is at least 4410 grams

1. 19.08% of human pregnancies are greater than 280 days.The probability a woman will have a 280 day long pregnancy is 19.08%.

2. The proportion of human pregnancies that last between 230 and 260 days is 34.16% The probability is .3416 that a randomly selected human pregnancy lasts between 230 and 260 days.