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To find 95% confidence interval for the population mean.
Diagnostic Tests: Uric Acid Overproduction of uric acid in the body can be an indication of cell breakdown. This may be an advance indication of illness such as gout, leukemia, or lymphoma (Reference: Manual of Laboratory and Diagnostic Tests, F. Fischbach). Over a period of months, an adult male patient has taken eight blood tests for uric acid. The mean concentration was = 5.35 mg/dl. The distribution of uric acid in healthy adult males can be assumed to be normal with σ = 1.85 mg/dl.
(a) Find a 95% confidence interval for the population mean concentration of uric acid in this patient's blood. What is the margin of error?
(b) What conditions are necessary for your calculations?
(c) Give a brief interpretation of your results in the context of this problem.
(d) Sample Size Find the sample size necessary for a 95% confidence level with maximal error of estimate E = 1.10 for the mean concentration of uric acid in this patient's blood.
Advertisers need to know which age groups are likely to see their ads. Purchasers of 120 copies of Cosmopolitan are shown by age group, (a) Make a bar chart and describe it. (b) Calculate expected frequencies for each class.
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Create the corresponding decision tree and make recommendations.
Which of the following studies used a participant observer approach?
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Utilizing the .05 level, do the results support the psychologists' theory. Elucidate your answer to somebody whom has never had a course in statistics.
Their resting heart rates were measured. A partial ANOVA table is given.
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