Random sample from a distribution with density function
Suppose that x1, x2, x3, x4, and x5 is a random sample from a distribution with density function: f(x) =1/theta for 0c. What is the appropriate value of c? Answer is .9937.
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You earned a 7.1% nominal rate of return on your investments over the past year. But at the same time, the reported inflation rate was 3.1%. What was your real rate of return for the year (the percentage increase in your real wealth)? Enter answer
In a study of the effectiveness of garlic for lowering cholesterol, 17 subjects were treated with Garlicin, which is garlic in a processed tablet form. The measurement of interest is the change in LDL level.
Steve and his friends are relaxing at a local tavern. The number of drinks that Steve's table receives is Poisson distributed with an average of 9 drinks per 3 hours. Write out the distribution and parameters you are using in each part below.
If an exercise scientist wants to estimate the proportion of American adults who exercise for 30 minutes three or more times per week. He wants to construct a 90% confidence interval with a margin of error of 1%.
Suppose that x1, x2, x3, x4, and x5 is a random sample from a distribution with density function: f(x) =1/theta for 0<x<theta. The null hypothesis theta=1 is to be tested against the alternative hypothesis theta=2 so that the significance le
In a past election, the voter turnout was 51%. In a survey, 843 subjects were asked if they voted in the election. Find the mean and standard deviation fot the numbers of voters in groups of 843.
A fair coin is tossed 20 times and x=6 heads are observed. Let p=P(head). A test of Ho:p=.5 versus Ha: p<.05 is to be performed based upon the results of the 20 tosses. What is the p-value for this hypothesis test?
It is estimated that 56% of the children between the ages of 3 and 5 years are already enrolled in school. In a sample of 150 children what is the probability that exactly 100 are enrolled in school?
About 34% of Americans have type A+ blood. A blood drive gets 140 donors. What is the probability that at least 40 of them are A+ blood donors?
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The U.S. healthcare system continues to struggle with delivering high value, defined as better health outcomes at lower cost, despite spending more per capita
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