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In a test of effectiveness of garlic for lowering cholesterol 42 subjects were treated with garlic in a processed tablet form. cholesterol levels were measured before and after the treatment the changes and after the treatment the changes in their lives of LDL cholesterol (in mg/DL) have a mean of 5.4 and a standard deviation of 18.6
a) What is the best point estimate of the population mean net change in LDL cholesterol after the garlic treatment.
b) Construct a 95% confidence interval 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.
Do these results suggest that the racial makeup of the faculty members is different from that of the students? (Use the .05 significance level.) Use the five steps of hypothesis testing and explain your findings.
Given 0.2, 0.4, and 0.4 are the probabilities for the sale of 100, 200, or 400 dozen roses, respectively, then the EOL for buying 200 dozen roses is?
What is the minimum sample size required to assure that your sample proportion "p" will be within the required margin of error around the population proportion "p". Use the traditional methods for testing hypotheses and show the results of all ste..
According to the National Association of Homebuilders, the average life expectancies of a dishwasher and a garbage disposal are about the same: 10 years.
When is a factorial ANOVA used? Give Example. When is a chi square test appropriate? Give Example. When does linear regression versus multiple regression apply? Give Example.
Based on the information in (a), find a one-sided lower 90% confidence limit for m. Also, find a one-sided upper 90% confidence limit for m.
Find the maximum and minimum prices of the houses a contractor will build to include the middle 65% of the market.
A study sponsored by American Express Co. and the French government tourist office found that old American stereotypes about French unfriendliness weren't true.
A manager of a supermarket estimated that 87% of customers use coupons in their grocery purchases. How large a sample is required to estimate the true proportion to within 0.01 with 98% confidence?
for the data in the following sample8 1 5 1 5a. find the mean and the standard deviation.b. now change the score of x 8
An internal study by the Technology Services department at Lahey Electronics revealed company employees receive an average of two emails per hour.
if the distribution of the measure of a random variable is not a normal distribution what implications might that fact
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