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Given that the researcher wants to be sure the mean difference in the change in hemoglobin levels has a margin of error no more than 0.2 g/dL and the difference in the stand deviation between the mean hemoglobin levels for the two forms of iron supplements used to treat anemia is 1.2 g/dL, what is the desired number of recruits for the study, assuming the individuals will participate in a crossover trial, if the study's attrition rate is expected to be .25?
You put a survey on the Harley website. Is this a good frame from which to select your sample? Explain.
Describe the effect of an outlier or extreme value on the confidence interval - Find the probability that the return for common stocks
a recent study focused on the amount of money single men and single women save monthly. the information is summarized
a production facility employs 20 workers on the day shift 15 workers on the swing shift and 10 workers on the graveyard
How many public accountants should be contacted if no previous estimates of the population proportion are available?
Emotional exhaustion, or burnout, is a significant problem for people with careers in the field of human services. Regression analysis was used to investigate the relationship between burnout and aspects of the human services professional's jo..
A supply professional has a range of compensation arrangements designed to meet the needs of a particular procurement.
Use the normal distribution tables to determine the probability that the sunshine hours per year are:
a 95 confidence interval for a population mean was reported to be 152 to 160. if s 15 what sample size was used in this
Three of the 10 airplane tires at a hangar are faulty. Four tires are selected at random for a plane; let F be the number of faulty tires found. Is F a binomial random variable? Explain.
A sensitive measuring device is calibrated so that errors in the measurements it provides are normally distributed with mean 0 and variance 1.00.
Find the weight that corresponds to each event. (Use Excel or Appendix C to calculate the z-value. Round your final answers to 2 decimal places.)
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