HW5_skeleton

7.1

• 1. Probability density function
• 2. Model
• 3. True
• 4. 1/2, because the total area should equal 1.
• 5. M-Sigma, M+Sigma
• 6. Proportion of the population with the charachteristic described by the interval values OR the probability that a randomly selected individual from the population wil have the charachteristic 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. 1. The probability that a randomly chosen baby weights 4410 grams is 2.28%. 2. 2.28% of babies weight 4410 grams or more.

1. 1. The probability of a pregnancy lasting longer than 266 days is 19.08%. The proportion of pregnancies that last longer than 266 days is 19.08%.
2. 1. The probability that a randomly chosen pregnancy lasts betweek 230 and 260 days is 34.16%. 2. The propotion of pregnancies that are between 230 an 260 days is 34.16%.