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Dotties Tax Service specializes in federal tax returns for professional clients, such as physicians, dentists, accountants, and lawyers. A recent audit by the IRS of the returns she prepared indicated that an error was made on 15 percent of the returns she prepared last year. Assuming this rate continues into this year and she prepares 63 returns. What is the probability that she makes errors on:
(a) More than 6 returns?(b) At least 6 returns?(c) Exactly 6 returns?
The critical value of F at 95% confidence when there is a sample size of 21 for the sample with the smaller variance, and there is a sample size of 9 for the sample with the larger sample variance is:
To test there is significant difference among the mean of income using ANOVA. A developer of real estate is considering investing in a shopping mall on the outskirts of Atlanta, Georgia.
The men took an average of 20.5 hours per year of personal time with a standard deviation of 2.75 hours. What is the pooled estimate of the variance? Round to three decimal places.
What is your null hypothesis? What is your alternative hypothesis? What your decision about the null hypothesis?
At the .05 significance level, can we conclude that the guideline is still reasonable?
If a lot is known to contain 10% defective items, find out the probability that lot will be rejected? Accepted?
Draw a simulation experiment for car agency and simulate using fleet of four rental cars for 10 days.
She figures that each box costs $ 2.59 plus $ 0.21 shipping and handling, which totals $ 2.80, then she adds $ 0.70 profit to each box and sells it for $ 3.50. Do you think this is a good pricing strategy? How would it compare to marking up by a p..
A random sample of 90 printers discovered that 25 of them were being used in small businesses. Find the 95% limit for the population proportion of printers that are used in small buisnesses.
Share with your peers the null and alternative hypotheses for a decision that is relevant to your life. This can be a personal item or something at work.
What score was earned by more students than any other score? Why? What was the highest score earned on the exam?
Suppose that a certain college class contains 54 students. Of these, 34 are sophomores, 35 are psychology majors, and 7 are neither. A student is selected at random from the class.
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