The speed with which utility companies can resolve problems is very Important. In the United Kingdom, Octopus Energy reports it can resolve customer problems the same day they are reported in 70% of the cases. Suppose the 15 cases reported today are representative of all complaints. Click here for the Excel Data File Required: a-1. How many of the problems would you expect to be resolved today? Note: Round your answer to 2 decimal places. Number of Problems 8.40 a-2. What is the standard deviation? Note: Round your answer to 3 decimal places. Standard Deviation
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Since the standard deviation is 2.44, we can assume a normal distribution and use the mean as the average number of problems that can be resolved today. Show more…
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The speed with which utility companies can resolve problems is very important. GTC, the Georgetown Telephone Company, reports it can resolve customer problems the same day they are reported in 80% of the cases. Suppose the 13 cases reported today are representative of all complaints. a-1. How many of the problems would you expect to be resolved today? (Round your answer to 2 decimal places.) Number of Problems 10.4 a-2. What is the standard deviation? (Round your answer to 4 decimal places.) Standard Deviation 1.4422 b. What is the probability 7 of the problems can be resolved today? (Round your answer to 4 decimal places.) Probability c. What is the probability 7 or 8 of the problems can be resolved today? (Round your answer to 4 decimal places.) Probability d. What is the probability more than 8 of the problems can be resolved today? (Round your answer to 4 decimal places.) Probability
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