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A recent study examined the association between high blood pressure and increased risk of death from cardiovascular disease. There were 2676 men with low blood pressure and 3338 men with high blood pressure. In the low-blood-pressure group, 21 men died from cardiovascular disease; in the high-blood-pressure group, 55 died. a. Compute the 95% confidence interval for the difference in proportions. b. Do the study data confirm that death rates are higher among men with high blood pressure? State hypotheses, carry out a significance test, and give your conclusions.A study of chromosome abnormalities and criminality examined data on 4124 Danish males born in Copenhagen. The study used the penal registers maintained in the offices of the local police chiefs and classified each man as having a criminal record or not. Each was also classified as having the normal male XY chromosome pair or one of the abnormalities XYY or XXY. Of the 4096 men with normal chromosomes, 381 had criminal records, while 8 of the 28 men with chromosome abnormalities had criminal records. Some experts believe that chromosome abnormalities are associated with increased criminality. Do these data lend support to this belief? Report your analysis and draw a conclusion.What conditions must be met before constructing a confidence interval for a proportion? Be sure to be specific with regard to whether you use p or p-hat in your check. What is the formula for the confidence interval? Then, define what each variable represents. In the 1996 regular baseball season, the World Series Champion New York Yankees played 80 games at home and 82 games away. They won 49 of their home games and 43 of the games played away. We can consider these games as samples from potentially large populations of games played at home and away. How much advantage does the Yankee home field provide? a. Find the proportion of wins for the home games. Do the same for the away games. b. Find the standard error needed to compute a confidence interval for the difference in the proportions. c. Compute a 90% confidence interval for the difference between the probability that the Yankees win at home and the probability that they win when on the road. Are you convinced that the 1996 Yankees were more likely to win at home? The state agriculture department asked random samples of Indiana farmers in each county whether they favored a mandatory corn check off program to pay for corn product marketing and research. In Tippecanoe County, 263 farmers were in favor of the program and 252 were not. In neighboring Benton County, 260 were in favor and 377 were not. a. Find the proportions of farmers in favor of the program in each of the two counties. b. Compute a 95% confidence interval for the difference between the proportions of farmers favoring the program in Tippecanoe County and in Benton County. Do you think opinions differed in the two counties?
On any given flight, an airline's goal is to fill the plane as much as possible without overbooking. If, on average, 10% of customers cancel their tickets, all independently of each other, what is the probability that a particular flight will be o..
A doctor want to estimate the HDL cholesterol of all 20-to 29 year old females. How many subjects are needed to estimate the HDL cholesterol within 2 points with 99%confidence assuming Q= 15.4 ? suppose the doctor would be content with 95% co..
And the rest of the people were from River City. Out of the sample, 19 people had some form of cancer. Thirteen of these people were from Laketown
Run the Wilcoxon rank-sum test to show whether there is a statistically significant difference between the mortality rates of children under the age of five years of the regions
How many additional records have to be gathered.
What is the critical path and project completion time for the budgeting process and what is the cost to complete the project based on the Normal Times?
5. Sixto Sanchez is the owner of Suburban Stylists. He is evaluating the service level provided to walk-in customers. Because he is enrolled in an MBA program at Eastern University, Sixto decides to sample walk-in customers for the next two w..
For a normal-shaped distribution with μ = 50 and σ = 8: a. What proportion of the scores has values between 46 and 54?
part-1- first reset the lower limit to zero and the upper limit to 1000 and then click update.- now put 6 points
The test statistic was calculated
Assignment Objectives: Construct a scatter plot for two variables, compute a correlation coefficient, and a regression equation. Use the regression equation to predict a value of the dependent variable.Purpose: In this week's assignment, we ..
Design and sketch an average control chart, showing upper and lower design limits, upper and lower action limits, and nominal value. Calculate and state the range control limit value.
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