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Serum ferritin is used in diagnosing iron deficiency. In a study conducted recently researchers discovered that in a sample of 28 elderly men the sample standard deviation of serum ferritin was 52.6 mg/L. For 26 younger men the sample standard deviation was 84.2 mg/L. At the .01 level of significance, do these data support the conclusion that the ferritin distribution in elderly men has a smaller variance than in younger men?
A. No, because the test value 1.60 is less than the critical value of 2.54B. Yes, because the test value 2.56 is greater than the critical value of 2.54C. Yes, because the test value 0.390 is less than the critical value 2.54D. Yes, because the test value 2.56 is greater than the critical value 0.394
Create Frequency Distribution of Sample Mean. Compute and Identifies Sampling Distribution of Sample Mean.
It is estimated that 0.5 percent of the 1200 callers per day to the Customer Service Department of Dell, Inc. will receive a message that the line is busy and be automatically transferred to a winning mode until a "representative is available to t..
Manufacturer of mole and gopher poison has experienced the following monthly demand for an environmentally sound pesticide poison. Using a Average method, what would the forecast have been for July?
Construct a 95% confidence interval for the difference in the proportions of women and men who have regular exercise programs.
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Explain the difference between the null hypothesis and the alternate hypothesis. How is the null hypothesis chosen (why is it null)? What is the importance of rejecting the null hypothesis, can we make a geneeral staement about the population base..
Each home was 24 and the standard deviation of the sample was 5 people. Develop a 98 percent confidence interval for the population mean.
The number of bombardment necessary to achieve the disintegration of a certain nucleus is assumed to have the distribution above. In one sequence in which b bombardments are available, of these have already failed to disintegrate the nucleus. What..
Suppose x follows a distribution with density function: f(x)=C*abs(x-2), 0 =
Automatic sensors to watch for lightening in a sample of 10 square kilometers. What are the mean and standard deviation of x, the mean number of strikes per square kilometer?
If appropriate, use the Tukey-Kramer multiple comparisons procedure to determine which file sizes significantly differ with respect to mean access read time. Test at the 95% confidence level.
To find out whether the course is effective in increasing sales, the appropriate set of hypothesis for testing is:
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