Homework Answers
Ans:
99% confidence interval for mean time for repairs
=93.2+/-2.576*(16.9/sqrt(110))
=93.2+/-4.15
=(89.05, 97.35)
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Computer Depot is a large store that sells and repairs computers. A random sample of 110...
16. Computer Depot is a large store that sells and repairs computers. A random sample of...
16. Computer Depot is a large store that sells and repairs computers. A random sample of 110 computer repair jobs took technicians an average of x 93.2 minutes per computer. Assume that ? is known to be 16.9 minutes. Find a 99% confidence interval for the population mean time ? for computer repairs. Write a brief explanation of the meaning of the confidence interval in the context of this (a) (b) problem 11 random sample of 56 credit-card holders showed...
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To receive full credit on the confidence intervals, you must show each of the following: a. The critical value (3 points) b. The margin of error (round answers to at least hundredths) (3 points) c. The minimum and maximum numbers of the interval (3 points each) To receive full credit on the interpretations, you must include information about the specific problem. When finding the sample size, remember to round all answers up to the next highest whole number. 4.) Computer...
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16. Computer Depot is a large store that sells and repairs computers. A random sample of 110 computer repair jobs took technicians an average of x 93.2 minutes per computer. Assume that ? is known to be 16.9 minutes. Find a 99% confidence interval for the population mean time ? for computer repairs. Write a brief explanation of the meaning of the confidence interval in the context of this (a) (b) problem 11 random sample of 56 credit-card holders showed...
To receive full credit on the confidence intervals, you must show each of the following: a. The critical value (3 points) b. The margin of error (round answers to at least hundredths) (3 points) c. The minimum and maximum numbers of the interval (3 points each) To receive full credit on the interpretations, you must include information about the specific problem. When finding the sample size, remember to round all answers up to the next highest whole number. 4.) Computer...
6.2.19-T Question Help In a random sample of four microwave ovens, the mean repair cost was $85.00 and the standard deviation was $13.00. Assume the population is normally distributed and use a t-distribution to construct a 99% confidence interval for the population mean μ. What is the margin of error of μ? Interpret the results. The 99% confidence interval for the population mean μ is (DD (Round to two decimal places as needed.) 6.2.21-T Question Help In a random sample...
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