S15 76.1 74.3 77.9 73.1 79.1 S16 75.4 73.6 77.2 72.4 78.4 S17 77.4 75.6 79.2 74.4 80.4 S18 76.3 74.5 78.1 73.3 79.3 $19 76.1 74.3 77.9 73.1 79.1 S20 76.2 74.4 78.0 73.2 79.2 69.0 81.0 69.0 81.0 (a) How many of the 75% confidence intervals constructed from the 20 samples contain the population mean, μ = 75? (b) How many of the 95% confidence intervals constructed from the 20 samples contain the population mean, μ = 75? (c) Choose ALL that are true. There is nothing wrong with the fact that the 95% confidence intervals are different from each other. Each confidence interval depends on its sample, and different samples may give different confidence intervals. It is surprising that some 75% confidence intervals are different from other 75% confidence intervals. They should all be the same, as long as the samples are random samples from the same population. The center of the 75% confidence interval for Sample 1 is 75.8, because the center of a confidence interval for the population mean must be the sample mean. We would expect to find more 95% confidence intervals that contain the population mean than 75% confidence intervals that contain the population mean. Given a sample, a higher confidence level results in a wider interval. None of the choices above are true.

Identify the following values. Consider the function shown with a graphical depiction of limƒ ( x = L , including the roles XC of & and d. 201 1.8- 1.6 1.4- 1.2- Y 1.0- 0.8- 0.6- 0.4 0.2- 0.0+T 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 2.2 1. 1.6 2. 1.0 E = 3. 0.4 = %3D 4. 0.6 >

In a test of the effectiveness of garlic for lowering cholesterol, 50 subjects were treated with garlic in a processed tablet form. Cholesterol levels were measured before and after the treatment. The changes (before - after) in their levels of LDL cholesterol (in mg/dL) have a mean of 3.2 and a standard deviation of 17.5. Construct a 95% confidence interval estimate of the mean net change in LDL cholesterol after the garlic treatment. What does the confidence interval suggest about the effectiveness of garlic in reducing LDL cholesterol? Click here to view at distribution table. Click here to view page 1 of the standard normal distribution table. Click here to view page 2 of the standard normal distribution table. C What is the confidence interval estimate of the population mean µ? mg/dL <μ< mg/dL (Round to two decimal places as needed.) What does the confidence interval suggest about the effectiveness of the treatment? O A. The confidence interval limits do not contain 0, suggesting…

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