Mathematics, 25.06.2020 05:01 allicat133
According to a 2011 report by the United States Department of Labor, civilian Americans spend 2.75 hours per day watching television. A faculty researcher, Dr. Sameer, at California Polytechnic State University (Cal Poly) conducts a study to see whether a different average applies to Cal Poly students. Suppose that for a random sample of 100 Cal Poly students, the mean and standard deviation of hours per day spent watching TV turns out to be 3.01 and 1.97 hours, respectively. The data were used to find a 95% confidence interval: (2.619, 3.401) hours/day. Which of the following are INVALID interpretations of the 95% confidence interval? A. About 95% of all Cal Poly students spend between 2.619 and 3.401 hours/day watching TV. B. There is a 95% chance that, on average, Cal Poly students spend between 2.619 and 3.401 hours/day watching TV. C. We are 95% confident that, on average, these 100 Cal Poly students spend between 2.619 and 3.401 hours/day watching TV. D. In the long run, 95% of the sample means will be between 2.619 and 3.401 hours. E. None of the above.
Answers: 1
Mathematics, 21.06.2019 17:20
Closing a credit card usually _your debt ratio.a. increasesb. decreasesc. improvesd. has no effect on
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Mathematics, 22.06.2019 01:10
Evaluate 8x2 + 9x β 1 2x3 + 3x2 β 2x dx. solution since the degree of the numerator is less than the degree of the denominator, we don't need to divide. we factor the denominator as 2x3 + 3x2 β 2x = x(2x2 + 3x β 2) = x(2x β 1)(x + 2). since the denominator has three distinct linear factors, the partial fraction decomposition of the integrand has the formβ 8x2 + 9x β 1 x(2x β 1)(x + 2) = correct: your answer is correct. to determine the values of a, b, and c, we multiply both sides of this equation by the product of the denominators, x(2x β 1)(x + 2), obtaining 8x2 + 9x β 1 = a correct: your answer is correct. (x + 2) + bx(x + 2) + cx(2x β 1).
Answers: 3
Mathematics, 22.06.2019 02:30
Shannon mary and john earn a weekly allowance ahannon earns the amount that is 2/3 of what john earns mary earns an amount that is 1 2/3 of what johns earns 20 dollars a week who eaens the greatest allowance and who earns the least
Answers: 3
According to a 2011 report by the United States Department of Labor, civilian Americans spend 2.75 h...
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