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The standard screening test for Down's syndrome is based on a combination of maternal age and the level of serum alpha fetoprotein. Using the test 80% of Down's syndrome cases can be identified while 5% of normals are detected as positives.
What is the sensitivity and specificity of the test? Suppose that 1 out of 500 infants are born with Down's syndrome.
You take a random sample and perform a hypothesis test, getting a p-value of 0.2578. What is the appropriate conclusion? Conclude at the 5% level of significance.
What is the optimal strategy for producing 500 tons of newsprint pulp, 600 tons of packaging pulp, and 300 tons of print stock quality pulp at minimum cost?
Florida State University administers a mathematics placement test to students where they 1st enter the university.
From her district, consisting of several hundred stores, she selects a random sample of 30 stores. For each store she gathered the following information.
You manufacture and sell an iron rod whose electrical conductivity is supposed to be 10.1. You plan to make 6 measurements of the conductivity of a rod you plan to sell.
Assume that the price of non-dividend paying stock is $32, its volatility is 30%, and the risk-free rate for all maturities is 5% per annum. Use derivagem to calculate the costs of setting up the following positions.
Formulate the hypotheses that can be used to determine whether union membership increased in 2006.
A student team examined parked cars in four different suburban shopping malls. One hundred vehicles were examined in each location.
Determine the percentage of households that have a credit card debt of more than $13,000.
This is called a one-time fling. About 10% of all adults deliberately do a opne-time fling and feel no guilt about it!
Could mud-wrestling be the cause of a rash contracted by University of Washington students in the spring of 1992? Two physicians at the University of Washington health center wondered this when one male and six female students complained of rashes..
Now suppose that a finished product is randomly selected. What is the probability that it is defective?
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