Calculus and Above

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2. A random sample of 49 observations from a normal
2. A random sample of 49 observations from a normal population yields a sample mean of 85. The population standard deviation is 14 and the significance level is 5%. Conduct the hypothesis testing on t… read more
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Assume that the data has a normal distribution and the
Assume that the data has a normal distribution and the number of observations is greater than fifty. Find the critical z value used to test a null hypothesis. Alpha = 0.05 for a two-tailed test … read more
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I have no idea what the answer is, 2. Vanecek, VP of
2. Brian Vanecek, VP of Operations at Portland Trust Bank, is evaluating the service level provided to walk-in customers. Accordingly, his staff recorded the waiting times for 64 randomly selected walk-in customers and determined that their mean waiting time was 15 minutes. Assume that the population standard deviation is 4 minutes. The 90% confidence interval for the population mean of waiting times is ________. (Points : 4) 14.27 to 15.73 14.18 to 15.82 9.88 to 20.12 13.86 to 16.14 18.12 to 19.87 … read more
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Use the given information to find the P-value. Also, use a
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For problems 1 – 3 you are to use the p-value approach to test
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I need some statistic questions answered in the next hour and
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Expert
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1. Assume that the data has a normal distribution and the
1. Assume that the data has a normal distribution and the number of observations is greater than fifty. Find the critical z value used to test a null hypothesis. ALPHA = 0.05 for a left-tailed test. -… read more
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Find the critical z value used to test a null hypothesis?
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Manual Banales, Marketing Director of Plano Power Plants
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The Connecticut Board of Education is concerned that first
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Find the critical value x2r based on the given information
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Sample of 45 home theatre systems has a mean price of $129.00
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16. In a survey of 630 males ages 18-64, 391 say they have
16. In a survey of 630 males ages 18-64, 391 say they have gone to the dentist in the past year. Construct 90% and 95% confidence intervals for the population proportion. Interpret the results and com… read more
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