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- In a population of 9500 subjects 80% possess a certain characteristic. In a sample of 400 subjects selected from this population, 82% possess the same characteristic. How many subjects in the population and the sample, respectively, possess this characteristicThe order and degiee of The oD f drilioSound City sells the TrueSound-XL, a top-of-the-line satellite car radio. Over the last 90 weeks, Sound City has sold no radios in six of the weeks, one radio in 12 of the weeks, two radios in 42 of the weeks, three radios in 22 of the weeks, four radios in 6 of the weeks, and five radios in 2 of the weeks. The following table summarizes this information. Number of Weeks Number of Having the Sales Amount Radios Sold 12 42 22 4 Compute a weighted mean that measures the average number of radios sold per week over the 90 weeks. (Round your answer to 2 decimal places.) unit of measure
- The owner of a cell phone store at Greenhills Shopping Center was nothappy when he learned that the average number of cell phones sold dailywas only 8 mobile phones. He hired a new seller and told him to tally the dailysales for 20 days. The following are the number of cell phones sold for thepast 20 days. 9 9 9 8 99 11 12 12 1610 12 8 11 1718 15 14 17 14Do the collected data present sufficient evidence to indicate that the averagenumber of cell phones sold daily has increased? Use 0.05 level ofsignificance. Assume normality in the population.The personnel department of a large corporation reported 60 resignations during the last year. The following table groups these resignations according to the season in which they occur. Carry out a test to determine if the number of resignations is uniform over the four seasons.The top six genres of podcasts in the year 2016 are listed in the table to the right. Use this information to list the elements of the following set. F, the set of genres with less than 30 million subscribers. Choose the correct answer below. O A. F = {News, Comedy, Fashion} O B. F = {News, Sports, Comedy, Fashion, Gossip, Fiction} OC. F={Sports, Gossip, Fiction} D. F = {News, Fashion, Gossip, Fiction} Rank 1 2 3 4 5 6 Genre News Sports Comedy Fashion Gossip Fiction Subscriptions 21,989,000 20,856,000 13,120,000 12,150,000 4,702,000 4,460,488
- Assume that there are 70 students: 36 who enjoy tennis, and 13 who enjoy swimming but not tennis. (1) How many students enjoy both sports? (2) How many students enjoy neither sport?enter any one of three different lines that have formed at three teller windows. Answer the following questions. The values listed below are waiting times (in minutes of customers at two different banks. At Bank A, customers enter a single waiting line that feeds three teller windows. At Bank B, customers m Bank A 6.6 Bank B 6.7 4.2 5.8 6.8 5.4 6.2 7.1 6.6 7.2 7.8 7.5 7.8 8.5 Click the icon to view the table of Chi-Square critical values. 7.8 9.3 7.8 10.0 construct a 90% confidence interval for the population standard deviation at bank A. Construct a 90% confidence interval for the population standard deviation at bank B.A state fisheries commission wants to estimate the number of bass caught in a givenlake during a season in order to restock the lake with the appropriate number ofyoung fish. The commission has information on the seasonal catch (CATCH) inthousands of bass per square mile; the size of the lake in square miles (SIZE); thenumber of lakeshore residences per square mile (RESIDENCE); the number of livingplaces for bass (i.e. weed beds, sunken trees, drop offs etc.) (STRUCTURE) andACCESS a dummy variable equal to 1 if the lake has public access and 0 if not. What do you think are the expected signs of the regression coefficients?Justify your choice. Using R-studio, estimate the multiple linear regression model. ALL input codes and output tables should be provided.(b) Is the overall regression equation statistically significant at the 1% level?Justify your answer. Ensure that you state the null hypothesis(es) and thedecision rule in your analysis.(c) Find and interpret a 95% confidence…
