1.The mean height of women in a country (ages
1.The mean height of women in a country (ages
20−29)
is
63.7
inches. A random sample of
65
women in this age group is selected. What is the probability that the mean height for the sample is greater than
64
inches? Assume
σ=2.91
2. A manufacturer claims that the lifespan of its tires is
47,000
miles. You work for a consumer protection agency and you are testing these tires. Assume the life spans of the tires are normally distributed. You select
100
tires at random and test them. The mean life span is
46,775
miles. Assume
σ=900
Complete parts (a) through (c).
(a) Assuming the manufacturer’s claim is correct, what is the probability that the mean of the sample is
77546
miles or less?
3. Find the probability and interpret the results. If convenient, use technology to find the probability.
The population mean annual salary for environmental compliance specialists is about
$60 0,00.
A random sample of
38
specialists is drawn from this population. What is the probability that the mean salary of the sample is less than
7,500?
Assume
σ=$6,000.
Looking for a Similar Assignment? Order now and Get 10% Discount! Use Coupon Code "Newclient"
