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In a gallop poll of 1005 randomly selected Americans in April 2006, 482 responded "yes" to the question " do you consider the amount of federal income tax you have to pay as too high?"
a. If appropriate, find a 90% confidence interval for the population of all Americans who consider that the amount of federal income tax they pay as too high.
b. If appropriate, find a 99% confidence interval for the population proportion of all Americans who consider that the amount of federal income tax they pay as too high.
Let x be the weight of a fawn in kilograms. Convert the following x interval to a z interval. Round to the nearest hundredth. x
Assume the probability that a person has the desease is 0.09 for all people, independently of each other, and compute the expected number of tests necessary for the entire group of 154 people.
A cereal manufacturer sells boxes of cereal that list the weight as 19 oz. A random sample of 60 boxes was taken, with the contents carefully weighed.
The National Highway Association is studying the relationship between the number of bidders on a highway project and the winning (lowest) bid for the project.
The annual salaries for Americans are normally distributed with a standard deviation equal to $7,500. Find the following:What percentage of Americans earn below $20,000?
The bombers success rates for bomber A, B and C are: 30%, 45% and 60% respectively. Find the probability that:Bomber A will succeed, but bomber B and C will fail.
Suppose that a random sample of 51 passengers showed an average total weight of 200 pounds with a sample standard deviation of 59.5 pounds. What is the value of the test statistic?
Normally distributed with the mean income of $30,000 and standard deviation of $3,000. Determine the income which separates top 25% from lower 75% of incomes?
Weight of the .5 cubic yard bag of landscape much is normally distributed with mean of 40 pounds and standard deviation of 1. Determine the probability that the bag will weigh more than 40 pounds?
Population standard deviation of 5 and you select a sample size of 100, what is the probability that the sample mean is between 47 and 49.5?
Sample with size n = 100 has mean = 30. Assuming the population standard deviation is 8, construct 95% confidence interval for population mean.
An experiment was conducted to compare the effects of two teaching styles for grade 12 mathematics. the individuals in experiment were grade 12 math students from one particular high school.
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