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Enzyme-linked immunosorbent assay (EISA)is the most common type of screening test for detecting HIV virus. A positive result from an ELISA indicates that HIV virus is present. For most populations, ELISA has a high degree of sensitivity (to detect infection)and specificity (to detect noninfection). Suppose the probability that person is infected with the HIV virus for certain population is 0.015. If HIV virus is actually present, the probability that ELIA test will give a positive result from ELISA is .01. If ELISA has given a positive result, use the Bayes' theorem to find the probability that the HIV virus is actually present.
Calculate chi-square for the cross-tab. Show your work. Is there a statistically significant relationship between these variables?
A local bank reported to the federal government that its 5,246 saving accounts have a mean of $1,000 and standard deviation of $240.
There is no significant difference in the mean household incomes between the two neighborhoods +0.05
For a random sample of 50 batteries, what is the probability that the sample mean will be less than 27.5 hours?
According to the 1996 Statistical Abstract of the United States, 7.6% of the scores on the verbal portion of the Scholastic Aptitude Test (SAT) exceeded 600.
Drawing the standard normal curve and indicating the area representing the probability and
Explain the overall statistical significance of the model, Explain the statistical significance for each independent variable in the model
What is the value of the slope of the least squares regression line for these data? Round your answer to at least four decimal places.
Construct a 98 percent confidence interval estimate of the difference between the two sample means (Please show work).
Computing the mean and standard deviation for the given data - Find the value for the new standard deviation
Oxytocin is a naturally occurring brain chemical that is nicknamed the "love hormone" because it seems to play a role in the formation of social relationships such as mating pairs and child-parent bonding.
The paired data below consist of the test scores of 6 randomly selected students and the number of hours they studied for the test.
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