= Given that (1, 2) is a critical point of z = f(x, y) By the...
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= Given that (1, 2) is a critical point of z = f(x, y) By the Second Derivative Test, (1, is classified as: = x³ + y² a local minimum point. O a local maximum point. a saddle point. The test is inconclusive. - 6xy + 6x + 3y - 2. Suppose that an accounting firm does a study to determine the time needed to complete one person's tax forms. It randomly surveys 27 people. The sample mean is = 23.6 hours and the sample standard deviation is s = 6.9 hours. The population distribution is assumed to be normal. A 90% confidence interval for the population mean time to complete the tax forms is: 21.3325.87 (hours) 19.91 ≤ ≤ 27.29 (hours) 20.31 ≤ ≤ 26.89 (hours) O 20.87 26.33 (hours) = Given that (1, 2) is a critical point of z = f(x, y) By the Second Derivative Test, (1, is classified as: = x³ + y² a local minimum point. O a local maximum point. a saddle point. The test is inconclusive. - 6xy + 6x + 3y - 2. Suppose that an accounting firm does a study to determine the time needed to complete one person's tax forms. It randomly surveys 27 people. The sample mean is = 23.6 hours and the sample standard deviation is s = 6.9 hours. The population distribution is assumed to be normal. A 90% confidence interval for the population mean time to complete the tax forms is: 21.3325.87 (hours) 19.91 ≤ ≤ 27.29 (hours) 20.31 ≤ ≤ 26.89 (hours) O 20.87 26.33 (hours)
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Statistical Techniques in Business and Economics
ISBN: 978-0078020520
16th edition
Authors: Douglas Lind, William Marchal
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