HW5_skeleton

7.1

• 1. Probability Density Function
• 2. model
• 3. True
• 4. the area under the curve to the right of μ equals the area under the curve to the left of μ, which equals 1/2
• 5. x= μ-σ, and x= μ+σ ( the inflection pints.)
• 6. frequency or 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. 2.28% of full-term babies have a birth weight of more than 4410 grams, the the probability of a full term baby weighing more than 4410 grams is 0.0228

1. The proportion of pregnancies that last more than 280 day is 0.1908, the probability is 0.1908.

2. the probability and proportion of pregnancies lasting between 230 and 260 days is 0.3418