Stat Homework
Stat 104 Chapter 6 Name: __________________________
6.5 HW Page 382 #3, 5, 11, 17, 25, 31
3. P(X>70)
5. P(X<80)
11. P(60≤X≤100)
Using the same random variable X as for the above problems, draw a graph of the normal curve with the desired probability and value of X indicated. Find the indicated values of X using the formula X1 = Zơ + µ.
17. The value of X larger than 97.5% of all X-values.
25. The two symmetric values of X that contain the central 98% of X-values between them.
31. Six-week-old babies consume a mean of µ = 15 ounces of milk per day, with a standard deviation ơ of 2 ounces. Assume that the distribution is normal. Find the probability that a randomly chosen baby consumes the following amounts of milk per day:
a. Less than 15 ounces
b. More than 17 ounces
c. Between 17 and 19 ounces
Stat 104 6.5 HW Page 1 of 2
Fall 2020 Instructor J Hodgson