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To help fill its seats for a particular flight, an airline offers a special nonrefundable fare of $200 for customers who make a reservation at least 21 days in advance and satisfy other restrictions. Thereafter, the fare will be $600. A total of 100 reservations will be accepted. The number of customers who have requested a reservation at full fare for this flight in the past always has a normal distribution with mean 40 and standard deviation 10. Determine how many seats should be reserved for customers who pay full fare.
The random variable x is known to be uniformly distributed between 1.0 and 1.5.
Below you are given a partial computer output based on a sample of 21 observations, relating an independent variable (x) and a dependent variable (y).
If the city manager knows the average salary nationally is $38,300, which test of significance should be used? Why?
What is the appropriate inferential statistical test for the case scenario? Why?
The national average SAT score (for Verbal and Math) is 1028. Suppose that nothing is known about the shape of the distribution and that the standard deviation is 100. If a random sample of 200 scores were selected and the sample mean were calcula..
The width of a confidence interval will be:
In looking at your business, when and why would you want to use a one-sample mean test (either z or t) or a two-sample t-test? Create a null and alternate hypothesis for one of these issues. How would you use the results?
Describe the factors that might cause variation in weight of Tootsie Rolls during manufacture.
Henry performed a two-tailed test for an experiment in which N = 24. He could not find his table of t critical values, but he remembered the tcv at df = 13. He decided to complete his obt.with this tcv. Is he more likely to make a type I or II err..
On average, you receive 2 telemarketing calls per day. What is the probability that you will not receive any telemarketing calls today.
What is the probability of getting a perfect score if you were forced to guess at each question?
Find the test statistic value for testing the equality of proportion variances.
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