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an airline company has a policy of booking as many as 16 passengers on an airplane that can only seat 15. A study has shown that only 94 percent of the booked passengers actually show up for the flight. Find the probability that if the airline books 16 persons, not enough seats will be available.
What is the probability that the mean completion time is between 1 and 2 hours, i.e.., 60 and 120 minutes?
To develop 3-month and 2-month moving average for the time series.The following data represents demand for company ABC's products for the last 10 months.
The average hourly wage of employees of a certain company is $9.83. Assume the variable is normally distributed.
The 2009 National Assessment of Educational Progress (NAEP) gave a mathematics test to a random sample of eighth-graders in Texas. The mean score was 287 out of 500. To give a confidence interval for the mean score of all Texas eighth-graders, you..
Their monitoring plan will take a random sample of 5 days sales per month and use the sample mean sales to identify shops that are under-performing. Establish the lower limit sales such that only 5% of the shops would have a sample sales mean belo..
In a study of check out scanners, 5 of 675 items were found to be overcharges, test at the 0.05 significance level, the claim that with scanners, 5% of sales are overcharges.
What is the F critical value to be used at the 0.05 level of significance with 7 numerator degrees of freedom and 12 denominator degrees of freedom?
Enlarged to 14 measurements, by including two additional measurements having a common value of 40 each. Find the standard deviation of the sample of 14 measurements.
A psychologist determined that the number of sessions required to obtain the trust of a new patient is 1, 2, and 3. Let x be the random variable indicating the number of sessions required to gain the patient's trust. The following probability fu..
For a candidate who guesses at all answers, find the mean and variance for the random variable X, the number of correct answers.
The auto parts department of an automotive dealership sends out an average of 8 special orders daily. The number of special orders is assumed to follow a Poisson distribution.
Suppose that the probability distribution of a random variable x can be described by the formula. Calculate the variance and standard deviation.
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