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The city council of a suburb of Columbus is interested in the level of public support for a new recreation center. A marketing research firm is selected who then selects a simple random sample of 50 adult residents and contacts each to determine whether the resident would be interested in joining this recreation center if it were built. Of these 35 indicated they would be interested in joining the recreation center.
The population of interest is
A. all household in the suburb.B. the 50 residents contacted.C. all adult residents in the suburb.D. the residents in the suburb that support the new recreation center.
A machine cuts circular filters from large rolls of material. If 7.3% of the filters fail to meet specifications, use the normal approximation to the binomial to compute the probability
The data consists of random sample of 30 households from the 2007 American Community Survey. Construct a frequency distribution and a histogram for each data set.
Determine the probability that sample mean will be greater than M=510. In symbols, what is p(M>510)? Determine the probability that sample mean will be greater than M=520.
In a public opinion poll, 48% of 189 respondents favor an elimination of taxes on dividend income.
Regulations related to the release of personal and medical information of a patient. Describes the relevant components of the medical record you expect the family physician will want to see.
Construct a 95 percent confidence interval for the population proportion of positive drug tests. Why may you assume that this is a normal distribution?
Create a scenario where the binomial probability formula could be used to determine the probability of some number of successes, x, in some given number of trials,n.
What about floor and ceiling effects? How can these issues preclude a significant correlation coefficient from being discovered?
The standard deviation is around 2.8. How many students should be sampled to be within 0.5 drink of population mean with 95% probability?
Costs of Televisions Listed below are prices (in dollars) and quality rating scores of rare-projection televisions (based on data from Consumer Reports). All of the televisions have screen sizes of 55 in or 56 in.
At the .01 significance level, is the mean grade of the women higher than that of the men? Set up the 5-step hypothesis testing procedure and solve.
At the .01 significance level, can the manufacturer conclude that the price reduction resulted in an increase in sales?
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