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A research manager at Coca-Cola claims that the true proportion, p, of cola drinkers that prefer Coca- Cola over Pepsi is greater than 0.50. In a consumer taste test, 100 randomly selected people were given blind samples of Coca-Cola and Pepsi. 58 of these subjects preferred Coca-Cola. Is there sufficient evidence at the 5% level of significance to validate Coca-Cola's claim? Conduct an appropriate hypothesis test using (i) the p-value method and (ii) the rejection point method.
A random sample of 221 homes in Kentucky found that 115 were heated by natural gas. Does the evidence support the claim for Kentucky at the a = 0.05 level.
q1. what is probability of observing 61325 when rolling fair dice?probabilities for fair dice p1p2p3p4p5p616q2. what is
Implantable heart pacemakers contain small circuit boards called substrates. These substrates are assembled, cut to shape, and fired. Some of the substrates will separate, or delaminate, making them useless.
A television station runs a telephone survey to determine how many persons in its primary viewing area have watched three recent special programs.
A random sample of 40 part time workers has a mean annual earnings of $3120 and a population standard deviation of $677. Compute the 95% confidence interval for the mean.
Assume that the $100 is randomly divided up, with all of the possible allocations counted in (a) equally likely. Find the expected amount of money.
find the sample size needed to estimate the percentage of adults who have consulted fortune tellers. use a 0.03 margin
Determine the z values for 29 and 34 hours. What percent of the garages take between 32 hours and 34 hours to erect?
Does the use of cell phones lead to a higher incidence of brain cancer? People with brain cancer were matched with people who did not have brain cancer on age, gender, and living environment. Each participant in the study was asked to answer question..
specimens of blood from 10 different animals were analyzed for blood count say y in units of 100 and packed cell volume
Twenty five young people were sampled in a survey to be used in determining the average expenditures (in dollars) for an evening of dining out.Create a cumulative relative frequency Ogive chart.
If a sample of size 75 produced a sample proportion of 0.45, what would you infer that the population proportion of mortgages "underwater" really is?
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