3 Scores On Comm 215 Final Exams Follow A Normal Distribution If You Are A Randomly Selected Student For This Exam Wha 1 (152.13 KiB) Viewed 35 times
3 Scores on COMM 215 final exams follow a normal distribution. If you are a randomly selected student for this exam, what is the probability that you will achieve a score that exceeds the average score by more than 1.25 standard deviations? Type your numerical an Numbers only 4 ZUBRAK Inc., sells licenses for new office management system, and advertises that businesses using the product and service will obtain, on average during the first year, a yield exceeding 7.7% on their initial investments. A random sample of 36 of these businesses produced the information on yields, averaging 8.4% with a standard deviation of 1.486% for the first year of operation. The analyst intended to use the data to test if there is sufficient evidence to support the advertiser's claim. What will be the p-value of the test against appropriate alternative?Assume that the distribution of yield is normal.
5 The correlation between monthly sales and advertisement cost for a product in 24 sales centers was found to be 0.45. Find the p-value for testing the direct relationship between these two quantities.
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