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In1990, 5.8% ofjob applicants whowere testedfor drugsfailed thetest. A randomsample of1440currentjobapplicantsresults in61failures (basedloosely on datafromthe AmericanManagementAssociation). Attheα=0.01significancelevel, testthebelowclaim(i.e.,thatthefailure rateis now lower) HO:p = 0.058 HA:p <0.058 a) Is thisanuppertail,lower tail,or two-tailtest?(5points) b) Are we testing meansor proportions?(5points) c)Statethe rule ofrejection(in termsofp-valueandlevel ofsignificance) (5points) d) Findthep-value(5points) e) Shouldyourejector notreject HO?(5points) f) Does theresult suggestthatfewer job applicantsnowuse drugs?(5 points) Software to help with the question but I don't know exactly where to start.
The p-value approach was to be used. A sample of size 49 gave a sample mean of 508. Given that σ = 30.2, and α = 0.01, find the p-value, and write your conclusion.
That's a much larger sample than standard sample surveys. In spite, we cannot trust result to give good information about any clearly defined population. Explain why?
Results are normally distributed with mean 200 and standard deviation 50. find probability that a single score will be less than 264.
Using a level of significance of .10, is there evidence that the population mean weight of the candy bars is greater than 7.3? Explain.
To be fair, the firm is randomly selecting two different employee names to 'win' the tickets. There are 6 secretaries, 5 consultants and 4 partners in the firm. Which of the following statements is not true?
If hypothesis test for single population variance is to be conducted by using significance level of to 0.10, a sample size of n = 16, and test is a one-tailed upper-tail test, the critical value is?
Based on these data, explain whether or not course attendance had any effect on determining of a restaurants violation of health code.
Find the 90% confidence interval estimate of the population mean. Interpret the interval estimate. 79 43 58 66 101 63 79 33 58 71 60 101 74 55 88.
Answer to a problem based on statistical graphics.Create a c-bar chart and determine if corrective action is needed.
From an inventory of 48 cars being shipped to local automobile makers, 12 have defective radios installed. What is the probability that one particular dealership receiving 8 cars will find 2 radios being defective? Make assumptions if necessary.
Find the probability between the given values for normal distribution.
Temperature is used to measure the output of a production process. When the process is in control, the mean of the process is µ = 128.5 and the standard deviation is σ = .4. Construct the x¯ chart for this process if samples of size 6 are to be us..
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