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A pharmaceutical company found that 46% of 1000 U.S. adults surveyed knew neither their blood pressure nor their cholesterol level.
Assuming the persons surveyed to be a simple random sample of U.S. adults, construct a 95% confidence interval for π = the population proportion of U.S. adults who would have given the same answer if a census had been taken instead of a survey.
the mean per capita income is 17635 dollars per annum with a standard deviation of 891. what is the probability that
They are thinking of introducing a new flavour, maple-marshmallow Frumpies, and want to know whether children will prefer the new flavour to the old one. Design a completely randomized experiment to investigate this question.
a researcher is interested in whether students who attend private high schools have higher average sat scores than
we choose an integer from 1 to 200 including 1 and 200 at random. recall an integer is just a whole number such as 1 2
Test the claim that the mean age of the prison population in one city is less than 26 years. Sample data are summarized as n = 25, x = 24.4 years, and s = 9.2 years. Use a significance level of α = 0.05.
Determine the probability distribution for the number of Hondas in a sample of three cars chosen from the top nine and what is the likelihood that in the sample of three at least one Honda is included?
The Gallup organization contracts 2871 male university graduates who have a white collar job and asks whether or not they had received a raise at work during the past 4 months. What is the population of the study?
What is the probability that Sara will die in her 60 th year? Using this probability and the $50,000 death benefit, what is the expected loss to Big Rock Insurance?
Do you think a linear model is appropriate here? Explain.- Interpret the meaning R2 of in this context.- Do the residuals show any pattern worth remarking on?
Suppose two random variables X and Y are both zero mean and unit variance.- Determine under what conditions on the constants a, b, c and d the random variables W and Z are uncorrelated.
the probability density function for the diameter of a drilled hole in a metal shop plant is 10e-10x-5 for x gt 5mm.
10 cobalts are ramdomly selected and the miles per gallon for each car are recorded. What is the probability that the mean miles per gallon exceeds 34 miles per gallon?
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