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Suppose the U.S. president wants an estimate of the proportion of the population who support his current policy toward revisions in the Social Security system. The president wants the estimate to be within 0.05 of the true proportion. Assume a 90 percent level of confidence. The president's political advisors estimated the proportion supporting the current policy to be 0.65. (Round up your answers to the next whole number.)
(a) How large of a sample is required? .
(b) How large of a sample would be necessary if no estimate were available for the proportion that support current policy?
Determine the largest village in terms of the population?
Is spine bone density is normally distributed in young women with a mean of 1.0 g/cm 2 and a standard deviation of .10 g/cm 2 , then how many young women out of 100 would you expect to have bone densities less than .85 g/cm 2 ?
Determine the z values for 29 and 34 hours. What percent of the garages take between 32 hours and 34 hours to erect?
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.
Determine the probability of choosing the area code at random which ends in the odd number if first digit cannot be 1 or 0?
Marks on statistics midterm test are normally distributed with mean of 78 and a standard deviation of 6. Determine the probability that class of 50 has average midterm mark that is less than 75?
Find a 95% confidence interval for the mean dielectric strength of the oil.
Test the following claim about the difference between 2 populations proportions p1 and p2 for the given level of significance a and given sample statistic. Is it right-tailed, left-tailed, two-tailed. Assume the sample statistic are from independe..
The life of a calculator manufactured by Intel corporation has a normal distribution with a mean of 50 months and a standard deviation of one year.
Multiple comparison procedures are going to be done using the Bonferroni method with = 0.05. The value of t** is 2.4667. Which of the following is the appropriate conclusion from carrying out these multiple comparisons?
Determine the expected number of Republicans who will win office in the coming election? Illustrate the standard deviation of r?
Write a paragraph summarizing the results of the analysis and determine whether the calculated values of chi-square are statistically significant
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