# The manager of a small bar is trying to decide

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20) The manager of a small bar is trying to decide whether to invest in a large-screen television. The manager leases a television for ten weeks and monitors sales during that period. Before the manager installed the television, average weekly revenue was approximately \$27,000. With the television installed, average weekly revenue was approximately \$32,000. After performing a hypothesis test, the editor obtained a p-value of 0.04. Assuming a 95% confidence level, which of the following conclusions is correct? Do not reject the null hypothesis, and conclude that the television does not increase revenue.
Do not reject the null hypothesis, and conclude that the television increases revenue. Reject the alternative hypothesis, and conclude that the television increases revenue Reject the null hypothesis, and conclude that the television increases revenue. Correct 21) The manager of a factory that is making an average of 14,000 pints of ice cream a day decides to start playing music for employees, believing this decision will increase both employee morale and productivity. However, the manager is concerned about the possibility that the music could distract employees, thereby decreasing productivity. After a month of playing music, the factory was making an average of 13,518 pints a day. The manager runs a two-sided hypothesis test to determine if the number of pints produced has changed. The p-value of the test is 0.238. What does this say about ice cream production?
22) If a standardized test has a mean score of 500 and standard deviation of 100, what percentage of test-takers score between 500 and 600?
34% correct 50% 23) The linear relationship between two variables can be statistically significant but not explain a large percentage of the variation between the two variables. This would correspond to which pair of R^2 and p-value?