Joint probability density function
Let X and Y have the joint probability density function f(x,y)=1/x, x>1, 0
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A random sample of size 81 is drawn from a population with a standard deviation of 12. If only 18% of the time a sample mean greater than 300 is obtained, what is the mean of the population?
Give an interpretation of b1 in the context of the problem. Give an interpretation of R2 in the context of the problem.
A manufacturing company produces water filter for the home refrigerators. The procedure has typically produced at least 4% defective. A recently designed experiment has led to changing seal to reduce defects. With the process running using new se
The breaking strength of 16 bundles of wool fibers have sample mean of 436 and sample standard deviation of 12. In addition, breaking strengths of 12 bundles of synthetic fibers have sample mean of 453 and sample standard deviation of 5. Determin
Let X and Y have the joint probability density function f(x,y)=1/x, x>1, 0<y<1/x, zero elsewhere. Find f(x|y), be sure to include its support. Find f(y|x), be sure to include its support. Find E (X|Y=y) and E(Y|X=x).
The following data were obtained from a repeated-measures study comparing three treatment conditions. Use a repeated-measures ANOVA with ? = .05 to determine whether these data are sufficient to demonstrate significant differences between the trea
The computer-science aptitude score, x, and the achievement score, y (measured by a comprehensive final), were measured for 10 students in a beginning computer-science course. The results were as follows. (Give your answers correct to two decimal
An analysis of variance produce SSbetween=30, SSwithin=60, and an F-ratio with df=2, 15. For this analysis, what is the F-ratio?
A poll asked the question, "What do you think is the most significant problem facing this country today?" Twenty-one percent of the respondents answered "crime and violence." The margin of sampling error was plus or minus 4 percentage points.
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