HW5_skeleton

7.1

• 1. probability density function
• 2. model
• 3. true
• 4. 1/2
• 5. μ - σ, μ + σ
• 6. proportion, probability
• 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 proportion of full-term babies that weigh over 4410 grams is 0.0228.

2. The probability that a randomly selected full-term baby will weigh 4410 grams or greater is 2.28%.

1. 1. The proportion of human pregnancies that last over 280 days is 0.1908.

2. The probability that a randomly selected human pregnancy will be 280 days or more is 19.08%.

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

2. The probability that a randomly selected human pregnancy will be between 230 and 260 days is 34.16%.