Unit 3 HW

# Exercise 1 the veetek vcr gambit exercise 2

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Exercise 1: The Veetek VCR Gambit Exercise 2: Pulluscular Pig Disorder Proportions The Customer Response Problem Confidence Intervals And Proportions Sample Size Finding a Preliminary Estimate of p-bar Summary Solving the Customer Response Problem Exercise 1: GMW Automotive Exercise 2: Crown Toothpaste Challenge: OOPS! Package Deliveries At left you will see an outline of the topics covered in Unit 3: Sampling and Estimation. There are five homework problems associated with this unit; one for each major area. There is one tab for each problem in this workbook. Once you have completed the unit online, you should attempt these problems and submit them to your coach for assessment and feedback.

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Time 73 19 16 64 28 28 31 90 60 56 31 56 22 18 45 48 17 17 17 91 92 63 50 51 69 16 17 The data at left represents a sampling of 27 insurance claims from the Coral Gables office of the insurance firm of Justin Case. The time Justin took to resolve these 27 claims (in days) is given here. Q-1a: Create a 95% confidence interval for the mean time to resolve insurance claims at the firm. Your answer should include the upper and lower limit.
An analysis of 1,000 cellular phone calls made from company phones at the offices of Kant, Taekitini, Moore, LLC reveals that the length of these calls is normally distributed, with μ = 240 seconds and σ = 40 seconds. Q-2a: What is the probability that a call from one of these phones will last less than 180 seconds? (Round to three decimals.) Q-2b: What is the probability that a call lasted between 180 and 300 seconds? (Round to three decimals.)

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