HW5_skeleton

7.1

• 1. Probabiltiy density function
• 2. model
• 3. True
• 4. 1/2
• 5. mu + sigma and mu - sigma
• 6. proportion of the population with the characterostic described by the interval of values or a probability a randomly selected individual from the population will have the characteristc described by the 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. The proportion of all babies born that are greater than 4410 is .0028. 97.72 percent of all babies born are less than 4410 grams. .

1. 19.08 percent of human pregnancies are greater than 280 days. The probability that a human pregancy is greater than 280 days is .1908

2. 34.16% of all human pregancies lasted between 230 and 260 days. The proportion of human pregnancies that last between 230 days and 260 days is .3416.