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Almost two-thirds of iron in the body is found in hemoglobin, the protein in the red blood cells that carries oxygen to the tissues. Iron deficiency could lead to anemia, a condition characterized by less than the normal quantity of hemoglobin in the blood. The following data gives the hemoglobin values for 7 female patients at risk for anemia, before and after they followed a 3-month dietary iron intake program: Before After 11.4 12.3 12.5 13.6 10.6 13.7 9.7 10.3 12.5 14.3 12.8 13.9 11.7 12.8
a) Was the program efficient in increasing the hemogloblin level? Justify your answer using a test of hypothesis for H0: mu1= mu2 against H1: mu1< mu2 , where mu1 and mu2 are the average hemoglobin levels before and after the program, respectively. Use the level alpha=0.01
b) What is the conclusion of a test of level alpha=0.01, if we assume (incorreclty) that the hemoglobin level after the program is independent of the hemoglobin level before the program? Assume that the two populations are normally distributed with equal variances.
It has been reported that 80% of taxpayers who are audited by the IRS end up paying more money in taxes. Assume that the auditors are randomly assigned cases and that one of the ways the IRS oversees its auditors is to monitor the percentage of ca..
Explain why an observed value of 250 hours is not unusual for an individual light bulb, even though it is outside the confidence interval you calculated.
The width of the interval without the finite population correction factor is wider than the confidence interval with the finite population correction factor.
two towns both have a mean income for their residents of 30000. the standard deviation of incomes of residents in
question consider the following population71 89 65 97 46 52 99 41 62 8873 50 91 71 52 86
1. a box contains 500 envelopes of which 75 contain 100 in cash 150 contain 25 and 275 contain 10. an envelope may be
The Problem Solving Inventory (PSI) has a normal distribution with mean = 90 and standard deviation = 15. A researcher suspects that the mean for female students is higher than 90.
Setup Null and Alternate hypotheses to test if average amount of soda in each can is less than 32 oz. Test the hypothesis using a = 0.05. What can you conclude from all this?
question what is an interaction? describe an example what are the variables within your population work social
Describe the data appear the strength of the relationship among variables is sufficient to warrant using linear regression forecasting.
Refer to the Journal of the European Academy of Dermatology and Venereology study of the link between nickel allergies and use of mascara or eye shadow
The following is sample information. Test the hypothesis at the .05 significance level that the treatment means are equal.
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