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The Hemingway Financial Company prepares tax returns for individuals. According to the Internal Revenue Service, individuals making $50,000 - $ 75,000 are audited at a rate of 3%. The Hemingway Company prepares six tax returns for individuals in that tax bracket, and three of them are audited.
Find the probability that when 6 people making $50,000 - $75,000 are randomly selected, exactly 3 of them are audited?
What is the expected number of audits for the 6 randomly selected individuals?
What is the standard deviation for the number of audits for the 6 randomly selected individuals?
In a large section of statistics class, the points for the final exams are normally distributed with a mean of 72 and a standard deviation of 9. Grades are to be assigned according to the following rule.
For any distribution the score that separates the highest 10% from the rest of scores is called.
Suppose we wish to estimate the true population of HSB students who own cars. We randomly sample 100 HSB students and find 20 students own a car.
After 1,000-trial simulation, examine statistical information generated and compare output of simulation with your findings in Problem .Briefly describe the significant similarities and differences.
Why are quasi-experimental designs used more often than experimental designs?
Conduct a hypothesis test. What is the p-value and how much evidence is there to conclude that the power plants cooling system is not working properly.
A single box contains 12 gloves, and it has been determined that 6 percent of gloves are defective. What is the likelihood that a box of gloves gets rejected?
As a bonus, students are encouraged to research new and interesting articles/ websites/ interactive tools, etc. which are pertinent to the class material.
A statistics instructor collected data on the time it takes the students to complete a test. The test taking time is uniformly distributed within a range of 35 minutes to 55 minutes.
The researcher computes the sum of squares for groups as SSG = 40030 and the sum of squares for error as SSE = 414780. The numerical value of the ANOVA F statistic is
Is there good evidence that treatment of staph-positive patients before surgery reduces the rate of post-surgical staph infection?
The results of the simple linear regression are provided below.
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