Work Time Lost due to Accidents At a large company, the Director of Research found that the average work time lost by em

Post by **answerhappygod** » Wed May 11, 2022 11:53 am

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Work Time Lost due to Accidents At a large company, the Director of Research found that the average work time lost by employees due to accidents was 100 hours per year. She used a random sample of 23 employees. The standard deviation of the sample was 5.3 hours. Estimate the population mean for the number of hours lost due to accidents for the company, using a 95% confidence interval. Assume the variable is normally distributed. Round Intermediate answers to at least three decimal places. Round your final answers to the nearest whole number << х 5

Wi-Fi Access A survey of 46 students in grades 4 through 12 found 68% have classroom Wi-Fi access. Find the 95% confidence interval of the population proportion. Round all intermediate and final answers to at least three decimal places. <<

Many people believe that the average number of Facebook friends is 135. The population standard deviation is 36.1. A random sample of 30 high school students in a particular county revealed that the average number of Facebook friends was 146. At a=0.01, is there sufficient evidence to conclude that the mean number of friends is greater than 135? Part 1 of 5 State the hypotheses and identify the claim with the correct hypothesis. H: H = 135 not claim H> 135 claim This hypotheses test is a one-tailed test. Part: 1/5 Part 2 of 5 Find the critical value(s). Round the answer to two decimal places. If there is more than one critical value, separate them with commas. Critical value(s): GA Х 6

Soft Drink Consumption A researcher claims that the average yearly consumption of soft drinks per person is 52 gallons. In sample of 54 randomly selected people, the mean of the yearly consumption was 53.9 gallons. The standard deviation of the population is 3.5 gallons. On the basis of the P-value, is the researcher's claim valid at a=0.10? Part: 0/5 Part 1 of 5 State the hypotheses and identify the claim. HO: H: (Choose one) (Choose one) The hypothesis test is a (Choose one) test.

Copy Machine Use A store manager hypothesizes that the average number of pages a person copies on the store's copy machine is less than 40. A sample of 42 customers' orders is selected. At a=0.05, is there enough evidence to support the claim using the P-value method? Assume a = 30.9. 24 113 9 3 72 36 80 17 70 37 9 17 21 5 51 4 NG 85 3 2 61 58 122 2 8 82 21 2 42 9 49 2 3 2 36 5 15 1 43 27 6 61 2 Send data to Excel Part: 0/5 Part 1 of 5 H: State the hypotheses and identify the claim. (Choose one) H: (Choose one) The hypothesis test is a (Choose one) test.