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In a representative sample of 1000 adult Americans, only 430 could name at least one justice who is currently serving on the U.S. Supreme Court. Using a significance level of .01, carry out a hypothesis test to determine if there is convincing evidence to support the claim that fewer than half of adult Americans can name at least one justice currently serving on the Supreme Court.
The time until a component is taken out of service is uniformly distributed on 0 to 8 hours. Two such independent components are put in series, and the whole system goes down when one of the components goes down.
Over the same period the average /maximum temperature in Dublin was 6.2 degrees Centigrade. The standard deviation was 2.9. How to compute the variance of temperature in Boston.
Suppose the probability of the worst-case scenario increases Compute the expected value of perfect information
Test at 5% significance level null hypothesis that population mean is 40 hours against alternative that it is higher.
Construction of confidence interval for difference between first and second sample mean revealed interval to be 10 plus or minus 12. We conclude.
Two letters are chosen at random without replacement from word statistical. Determine the probability that both letters are s?
How do we use a least squares regression line? Please explain in your own words. What is the range for the coefficient of determination? Please explain in your own words.
Find the sample proportions and test statistic for equal proportions. Is the decision close? Find the p-value.
A manufacturer claims that he makes light bulbs each of which has a 0.9 probability of operating successfully when plugged in.
Formulate the hypotheses that can be used to determine whether union membership increased in 2006.
Here is a simple probability model for multiple-choice tests. Assume that each student has probability p of correctly answering the question chosen at random from universe of possible questions.
Provided that the selected student excels in sports, determine the probability that the student is a boy?
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