HW5_skeleton

7.1

• 1. type answer here. probability density function (pdf)
• 2. type answer here. model
• 3. type answer here. true
• 4. type answer here. the area under the normal curve to the right of the mean equals the area under the curve to the left of the mean, which equals 1/2.
• 5. type answer here. the points at x=mean - standard deviation and x= mean + standard deviation
• 6. type answer here. probability or proportion
• 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. type answer here.
4. 2.28% of all full-term babies have a birth weight of more than 4410 grams.

2. The probability is 0.0228 that the birth weight of a randomly chosen full-term baby is more than 4410 grams.

1. type answers here. i)The proportion of human pregnancies that last more than 280 days is 0.1908.

2. The probability that a randomly selected human pregnancy lasts more than 280 days is 0.1908.

2. type answers here.
3. The proportion of human pregnancies that last between 230 and 260 days is 0.3416.

2. The probability that a randomly selected human pregnancy lasts between 230 and 260 days is 0.3416.