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The ages of subscribers to a certain mailing list are normally distributed with mean 35.5 years and standard deviation 4.8. What is the probability that the ages of a random subscriber is
(a) More than 35.5 years?(b) Between 30 and 40 years?
The fixed monthly cost of operating the production facility is $3000. How many units of part # 2206 have to be sold in a month to break-even?
Find the probability of guessing (a) exactly three answers correctly, (b) at least three answers correctly, and (c) less than three answers correctly.
Assume the population standard deviation of unoccupied seats for all flights for this airline is equal to 4.103. Find a 90% confidence interval for μ and the mean number of unoccupied seats
Compute the within group variability. Do you require any post hoc testing? Why or why not? Decribe in detail.
1.on a certain airline the chance the early flight from atlanta to chicago is full is 0.8. the chance the late flight
How would to solve this statistics question. In a gallop pill of 1,038 adults ,540 said that second-hand smoke is very harmful. What percentage of adults who said second-hand smoke is very harmful?
2. we saw in class that a coin-flipping game that pays 2n if the first head appears on the nth that is a random
The manufacturer of the ColorSmart-5000 television set claims that 95 percent of its sets last at least five years without needing a single repair.
What is the probability the selected employee is a production worker? What is the probability the selected employee is either a production worker or a supervisor?
2. The staff at a local psychiatric facility wants to determine whether implementing a No Smoking rule significantly decreases the length of stay of inpatients.
I want to establish if a new product is worth marketing. At least 85 percent of the public must express interest in the product and for those that do the average cost they are willing to pay must be at least $47.50.
Department decided to conduct the test at the 0.05 level of significance whether the modification actually increased the life of the AAA battery. What was their decision rule?
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