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1. A manufacture of tires wants to advertise a mileage interval that excludes no more than 10% of the mileage on tires he sells. All he knows is that, for a large number of tires tested, the mean mileage was 25,000 miles, and the standard deviation was 4000 miles. What interval would you suggest?
2. Five cards are drawn from a standard 52-card playing deck. What is the probability that all 5 cards will be of the same suit?
A certain airplane has two independent alternators to provide electrical power. The probability that a given alternator will fail on a 1-hour flight is .02. What is the probability that
assume x is a standard normal random variable and y n09so variance is 9. what is the 97.5 percentile of px and
Two different simple random samples are drawn from two different populations. The first sample consists of 20 people, with 10 having a common attribute.
Suppose a simple random sample of 30 days is selected for observation. What is the probability that the sample mean for the 30 days will be between 300 and 340 books?
What is the point estimate of the mean planned expenditure by all Americans taking long summer vacations in 2002?
Suppose that data is recorded for equal period of "before"-"after" time. Use 1% level for risk. Given processed data, explain what John must do.
What is the probability that more than 25% of the business travelers say that the reason for their most recent business trip was an internal company visit?
What is the probability that a randomly selected eagle's wingspan is exactly 77 inches? Explain your answer. What is the probability that a randomly selected eagle's wingspan is 77 inches or less?
question heights of women have a bell-shaped distribution with a mean of 163cm and a standard deviation of 5cm.
Suppose we select a sample of 16 cuts from various CDs sold by CRA CDs, Inc. What can we say about the shape of the distribution of the sample mean? What is the standard error of the mean?
question length of pregnanciesthe length of human pregnancies from conception to birth varies according to a
Tourism is one consideration for CoffeeTime's future, A survey of 1,233 visitors to mumbai last year revealed that 110 visited a small cafe during their visit.
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