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100 people are given a standard antibiotic to treat an infection and another 100 are given a new antibiotic. In the ?rst group, 90 people recover; in the second group, 85 people recover. Let p1 be the probability of recovery under the standard treatment and let p2 be the probability of recovery under the new treatment. We are interested in estimating θ = p1 - p2. Provide an estimate, standard error, an 80 percent con?dence interval, and a 95 percent con?dence interval for θ.
given the following estimates of various components of genetic variationva 90 vd 50 vi 35 ve 125what is
A manufacturer can typically process 176-264 devices a given period of concern. In this situation the processing event is either pass or fail.
British scientists have developed a 15 minute brain scan they hope could be used to detect autism in children. Autism and related disorders affect up to 7 out of every 1000 individuals.
In recent years, 3.4 children per year get sick with measles in Minnesota. If a recent year is taken at random, what is the probability that:
Q. An owner of a chain of stores would like to predict weekly sales based on the number of customers who made a purchase. A random sample of 10 stores were selected. The weekly sales are in thousands of dollars.
in exploring possible sites for a convenient store in a large neighborhood the retail chain wants to be 95 certain of
Can we conclude from this that most workers there earn between $25 and $35 per hour? Is this right interpretation for margin of error?
the study obtained a measure to determine how comfortable the shopper was in a store. Higher scores indicated greater comfort. Suppose the following data were collected. Use a = .05 to test for differences among comfort levels for three types of b..
A sample of 36 packages reveals the mean weight to be 3.01 pounds, with a standard deviation of 0.03 pounds. What is the estimated population mean?
Test the claim that the actual percentage is 53%. Use a 0.10 significance level.
a coin is tossed three times. find the probability that the coin lands on tails then heads then
What would the researchers have concluded about the study medication if they had ignored the effect of sepsis on survival in their analysis?
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