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The effectiveness of treating respiratory infections with herbal remedies was studied. "Days of fever" was used to measure effects. Among 413 children treated with herbal remedies, the mean number of days with fever was 0.56, with a standard deviation of 1.48. Among 453 children given placebo, the mean was 0.68, with a standard deviation of 1.37 days. Use a 0.01 significance level to test the claim that herbal remedies affect the number of days with fever. Do not assume the population standard deviations are equal. Based on these results, do herbal remedies appear to be effective?
A. No, null hypothesis is not rejected
B. No, null hypothesis is rejected
C. Yes, Null hypothesis is not rejected.
D. Yes, Null Hypothesis is rejected
according to the chronicle of higher education 69 of mba graduates in 2007-8 had some student loan debt when they
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In an ABCNews.com nationwide poll done in 2001, the proportion of respondents who thought that it should be illegal to use a hand held cell phone while driving a car was 69 %. The poll's sample was 1027.
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For one of the first statistics exam, the coefficient of determination between hours studied and the grade earned was 80 percent. The standard error of estimate was 10.
What is your opinion: Does this study provide evidence that the postmortem serotonin levels are different between patients who die of heart disease and patients who die of other causes?
Create a research question for which the appropriate test of the statistical hypothesis would require the use of a z-score.
Compute a 90 percent confidence interval for the difference among the two population proportions. The CEO of the company would like to find out if Canadians.
What is a prime number, and why are prime numbers important? What do you call a number that is not prime? What is the largest prime number ever found?
in a data communication system several messages that arrive at a node are bundled into a packet before they are
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