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One test that people who wish to donate blood must undergo is a test of iron level. Individuals with insuficient iron levels are not permitted to donate blood. A preliminary inexpensive screening test is initially performed for iron level. If an individual fails this test, he or she is given a more expensive second test of iron level. Suppose that 30% of the people who fail the first test pass the second test and are allowed to donate blood. A doctor is searching for a blood donor among those whil failed the first test. She randomly selects individuals from those who failed the first test.
What is the probability that the doctor will find a suitable donor on the
1) Second selection?
2) fourth selection?
3) tenth selection?
A teacher figure that final grades in the statistics department are distributed as A,25%, B, 25%, C, 40%, D, 5%, F, 5%. At the end of the randomly selected semester, the following number grades were recorded.
A study regarding the relationship between age and the amount of pressure sales personnel feel in relation to their jobs revealed the following sample information.
1. a bus starts with eight people 2 of which are jack and diana and stops at 12 locations. assuming nobody else gets on
at issue is the proportion of people in a particular county who do not have health care insurance coverage. a simple
the department of natural resources reports that a fish is unsafe to eat if the polychlorinated biphenol pcb
A standard deviation of $125. A) what is the point estimate of the population mean? B) develop a 95% confidence interval for the population mean.
the probability that an american ceo can transact business in a foreign language is 20. ten american ceo s are chosen
The waiting times have a standard deviation of 5.7 minutes. Use a 0.025 significance level to test the claim that with a single line, waiting times vary less than with individual lines.
American Demographics reported the results of a survey on the planning habits of men and women. In response to the question.
a researcher collects data to see if medical insurance type and doctors visits per year are related. he obtains the
Determine whether the Zero Population Growth data for urban U.S. resident is also true for rural U.S. residents on the basis of the sample data with α=0.05.
What percentage of observations of a normal distribution are represented by the mean plus or minus 1.96 standard deviations?
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