id=2265102&page=3 Laurie Laprade A union leader of a major company claims that the new incentive scheme of the contract has resulted in average weekly earnings well under $500 for all customer service 5.00 workers. She takes a random sample of 16 workers and finds that their weekly earnings have an average of $475.25 and a standard deviation of $48.6. Assume the distribution of weekly earnings is normal. What is the approximate p-value (closest) for testing the appropriate hypotheses? Answer: ed The 2018 Canadian internet use survey showed, overall, 94% of Canadians had home internet access, and about 84% of the internet users bought goods or services online, spending $57.4 billion. Suppose 64 internet users with home internet access were randomly and independently sampled. Find the probability that at least 20% of those 5.00 sampled currently did not buy goods or services online. Round your answers to the nearest ten-thousandth (4 decimals). Answer: According to the guidelines of the World Anti-Doping Agency (WADA), athletes are subject to testing both 'in-competition' and 'out-of-competition' for prohibited substances. Suppose that the tests for prohibited substances can identify a substance abuse 98% of the time. However, 1% of the time the test indicates a positive result 5.00 although the athlete is not a prohibited substance user. If 5% of all athletes are users of prohibited substances, what is the probability that an athlete who has tested positive tion for a prohibited substance is not really a prohibited substance user? Round your answers to the nearest ten-thousandth (4 decimals). Answer: An audit firm surveyed salespeople cheating on their expense reports and other unethical conduct. In the survey of 200 managers, 58% of the managers have caught ered salespeople cheating on an expense report, 50% have caught salespeople working a second job on company time, 22% have caught salespeople listing a "bars" as a of 5.00 "restaurants" on an expense report, and 19% have caught salespeople giving a kickback to a customer. What is the estimated upper limit for the proportion of managers stion who caught salespeople working a second job on company time with a 96% confidence? Answer: Consider a linear regression model with a response Y, and the predictors, X,, X2. X,, X- Based on a random sample of 25 observations, the estimated model and other wered statistics are obtained as shown below: of 5.00 y, =-151.639+0.39849x1; + 0.00445x2, +1.42460x3, + 26. 79679X4,, estion SST = 357572 and standard error = 41.45714. What is the value of the test statistic for testing the overall utility of this model? Round your answers to the nearest ten- thousandth (4 decimals).