A The viscosity of lubricant oil used in engine is normally distributed and that the standard...
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A The viscosity of lubricant oil used in engine is normally distributed and that the standard deviation is 12.00 mPa. s. When 49 random samples are tested, the mean viscosity is found to be 89. 00 mPa s. Find a 95% confidence interval for the true mean for the viscosity. Express your answer correct to 2 decimal places. Do not include units in the answers. . Solution: 1) Critical Value = A2) Margin of error = A 3) Confidence interval (Type lower limit in the first textbox and upper limit in the A <μ< second textbox: A The viscosity of lubricant oil used in engine is normally distributed and that the standard deviation is 12.00 mPa. s. When 49 random samples are tested, the mean viscosity is found to be 89. 00 mPa s. Find a 95% confidence interval for the true mean for the viscosity. Express your answer correct to 2 decimal places. Do not include units in the answers. . Solution: 1) Critical Value = A2) Margin of error = A 3) Confidence interval (Type lower limit in the first textbox and upper limit in the A <μ< second textbox:
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Given Population standard deviation 0 1200mPas Sample size n 49 Sample mean viscosi... View the full answer
Related Book For
Business Statistics in Practice
ISBN: 978-0077404741
6th edition
Authors: Bruce Bowerman, Richard O'Connell
Posted Date:
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