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Views on the DREAM Act. A random sample of registered voters from Tampa, FL were asked if they support the DREAM Act, a proposed law which would provide a path to citizenship for people brought illegally to the US as children. The survey also collected information on the political ideology of the respondents. Based on the mosaic plot shown below, do views on the DREAM Act and political ideology appear to be independent? Explain your reasoning.
A recent study of 75 workers found that 53 people rode the bus to work each day. Find the 95 percent confidence interval of the proportion of all workers who rode the bus to work.
Is the difference between the pretest and the posttest means statistically significant at the .05 level? Make statement of the results of the significance test?
Use the given data to find the correlation coefficient r, regression equation and scatter plot in MS Excel. Based on the linear correlation coefficient r, is this a good model? Explain
The time in months between occurrences of safety violations in a toll manufacturing facility is shown in the table below for three operators, "A," "B," "C".
A craftsperson makes stuffed animals for sale. 85% of the animals she makes are bears while the remaining 15% are rabbits. Suppose she sells 75% of her bears at craft shows but only 50% of her rabbits are sold at craft shows.
at parkview at any given time the probability that a randomly selected student is a female is 30. with this binomial
The life corn delight popcorn maker is normally distributed with them mean of 20 months and a standard deviation of two months. The manufacturer will replace on the life popper if it breaks during the guarantee period.
Can Mr. Rutter conclude that the mean weight of the bags is less than 50 pounds? Use the 0.1 significance level. In a brief report, tell why Mr. Rutter can use the z distribution as the test statistic.
hits on a website occur quite infrequently. they occur randomly and independently with an average of 5 per week.a find
a simple random sample of 50 adults is obtained and each persons red blood cell count is measured. the sample mean is
Pollution. A company with a fleet of 150 cars found that the emissions systems of 7 out of the 22 they tested failed to meet pollution control guidelines.
Consider the mode m of the binomial (n, p) distribution. use the formula m = int (np +p) to show the following:
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