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In a test of the effectiveness of garlic for lowering cholesterol, 45 subjects were treated with garlic in a processed tablet form. Cholesterol levels were measured before and after the treatment. The changes in their levels of LDL cholesterol )in mf/dl) have a mean of 5.6 and standard deviation of 19.5
a. What is the best point estimate of the population mean net change in LDL cholesterol after the garlic treatment?
b. Construct a 90% confidence interval of the mean net change in LDL cholesterol after the garlic treatment.
c. What does the confidence interval suggest about the effectiveness of garlic in reducing LDL cholesterol.
Determine the proportion of homes that have a pool. At the .05 significance level, can we conclude that less than 40 percent of the homes sold in the Denver area had a pool? What is the p-value?
Joe wants to sell his car. He receives one offer each month and must decide immediately whether to accept the offer. Once rejected, the offer is lost.
Calculate the energy of vacancy formation in aluminum, given that the equilibrium number of vacancies at 500?C is 7.57 × 1023 m-3. State your assumptions.
What is the mean and standard deviation of the flow time? What is the probability that the total time will be less than 920 seconds?
The results of a published research study indicated that babies fed on breast milk gained an average of 11 ounces per week; babies fed a powdered instant baby formula gained an average of 2 ounces per week.
We use the observation vector Y = Y(n) = [Y1 ··· Yn]' to estimate X = X21. Find the LMSE estimate L (Y(n)) = (n)Y(n). Graph the mean square error e∗L(n) as a function of the number of observations n for φ0 ∈ {0.1, 0.5, 0.9}. Interpret your results...
an insurance company estimates 45 percent of its claims have errors. the insurance company wants to estimate with 95
On a test, a sample of 5 students has a mean score of 78. The scores of four students of them are: 87, 81, 76, 53. Find the test score of the fifth student and standard deviation of this sample.
As a part of their testing program Sony tests samples of 25 batteries. What can you say about the shape of the distribution of sample mean?
De-seasonalise the hotel industry turnover data for 2008 to 2010. Plot both the original and the de-seasonalised quarterly turnover data for the Cape Town hotel industry from 2008 to 2010 on the same axis.
if a person bought 1 share of google stock within the last year what is the probability that the stock on that day
In your environment (business or personal), please give an application of exponential smoothing and why you would use this technique.
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