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Question: BLOOD TESTS If a certain disease is present, then a blood test will reveal it 95% of the time. But the test will also indicate the presence of the disease 2% of the time when in fact the person tested is free of that disease; that is, the test gives a false positive 2% of the time. If 0.3% of the general population actually has the disease, what is the probability that a person chosen at random from the population has the disease given that he or she tested positive?
among coffee drinkers men drink of 3.2 cups per day with a standard deviation of 0.8 cups. assume the number of coffee
the positioning of nests in shrubs was noted for a species of bird. use the data shown to determine if there was a
What is the inherent meaning and justification of cross multiplication as it applies to solving an equality? Is | x -2 | the same as | 2 - x |? Please explain your answer. How do you express the following mathematically?
Suppose X and Y are independen- Find the joint PDF of R and Θ. - Show that the marginal PDF of follows a Rician distribution.
The probability that you win is 6/36=1/6, and P(loss) = 5/6. Find a rough range for a) 200 plays, (b) 20, 000 plays. You must show your work when you compute the SD of the box.
You are the consumer, so what variables do you believe the magazine should have used to make the ratings meaningful to you? Write a short recommendation with your suggestions to the magazine.
Suppose a population can be approximated by a normal model with expected value μ = 50 and standard deviation σ = 9.8. Find the probability that a random sample of size 4 has a mean x between 47.8 and 53.7.
In the exercise above, examine the impact of using a truncated exponential distribution Exp(λ) on the variance of the approximation of the tail probability.
Statistical aptitude scores are known to be normally distributed, with mean = 50. A researcher has designed a new program intended to improve students statistical aptitude, and has enrolled a sample of 30 students in it.
1. in the united states the average weight of an adult male is 172 pounds with a standard deviation of 29 pounds.
Create a 95% confidence interval for the percentage of all auto accidents that involve teenage drivers.- Explain what your interval means.
an online computer retailer sells both desktop and laptop computers. assume that 8 of the computers that the online
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