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A major dvd rental chain is considering opening a new store in an area that currently does not have any such stores. The chain will open if there is evidence that more than 5,000 of the 20,000 households in the area are equipped with dvd players. It conducts a telephone poll of 300 randomly selected households in the area and finds that 100 have dvd players. state the p-vaule of the test
Suppose x is a random variable with n=3 and p=.3, calculate the value of p(x), x=0,1,2,3, using the formula for a binomial probability distribution?
Test the claim that with garlic treatment, the mean change in LDL cholesterol is greater than 0. What do the results suggest about the effectiveness of the garlic treatment?
In an extensive study involving thousands of British children, Arden and Plomin (2006) found significantly higher variance in the intelligence scores for males than for females. Following are hypothetical data, similar to the results obtained i..
Collect a real data set consisting of a sample of at least forty observations
What is the probability that a customer will receive his meal in less than 10 minutes?
Are the events of being man-made and being polluted independent and write out the sample space - Find the PPV and NPV for a population where 2% of the people have the disease.
what is the significance of hypothesis in research? what are type i and ii errors inhypothesis
The student government at a university conducted a study
There evidence that the mean price is higher at Whole Foods Market than at the Fairway supermarket and interpret the meaning of the p-value in (a)
Calculate the sample size needed given these factors
Problem 1. An internet service provider (ISP) provides internet connections to 100,000 customers. 10,000 of the customers have high-speed connections and 90,000 of the customers have low-speed connections. The ISP wants to know whether, on the ..
A student surveyed 200 students about hours a night spent sleeping, the data showed a normal distribution with a mean of 6.8 hours and a standard deviation of 0.75 hours. what percentage of the students spent less than 4.55 hours sleeping per..
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