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An airline, believing that 7% of passengers fail to show for flights, overbooks (sells more tickets than there are seats). Suppose that for a particular flight involving a jumbo-jet with 260 seats, the airline sells 280 tickets.
a. What is the expected number of ticket holders that will fail to show for the flight? i know this is 19.6
b. What is the probability that the airline will not have enough seats for all the ticket holders who show for the flight?
A newspaper ad for a manager trainee position contained the statement "Our manager trainees have a first-year earnings average of $20,000 to $24,000." Do you think that the ad is describing a confidence interval? Explain your answer.
In order to determine whether or not a driver's education course improves the scores on a driving exam, a sample of six students were given the exam before and after taking the course. The results are shown below:
Consider a high school basketball player that is a 70% free throw shooter. During the season, what is the probability that this player makes the third free throw in five shots (exactly 3 shots in 5 attempts)?
If the estimate is to be within 8 mpg of the true mean with 98% confidence and the estimated standard deviation is 22 mph, how large a sample size must be taken?
The regression of Y on X predicts? When predicting Y, adding a second predictor variable to the first predictor variable X.
The minimum sample size needed in order for the union to be confident that its estimate is within of ? Suppose that the standard deviation of wages of foodservice workers in the U.S. is about .
in town of 500 people 285 read hindu and 212 read indian express and 127read times of india 20 read hindu and times of
during the dry month of august one u.s. city has measurable rain on average only two days per month. if the arrival of
Assume the variable is normally distributed. If an individual is selected, find the probability that the individual's pressure will be between 120 and 121.8 mmHg.
Describe the data for a correlational research study. Explain how correlational research is different from other research evaluating the relationship between two variables.
an emergency breakdown service suggests that 50 of all drivers are registered with their service. a random sample of
The length of a particular telemarketing phone call, x, has an exponential distribution with mean equal to 1.5 minutes.
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