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A sample proportion is calculated from a sample size of 394. How large of a sample would we need in order to decrease the standard error by a factor of 9?1) 1,182
2) 788
3) 3,546
4) 3,940
5) 31,914
Let X 1 , X 2 , X 3 , X 4 be a random sample from a Poisson distribution with parameter λ and let Y = X 1 + X 2 + X 3 + X 4 . You decide to test λ = 1.60 versus λ
a) Find the marginal density of Y. b) Find E(X) HINT: What is E (X|Y=y) ?
Determine 80% confidence interval for average weights of Allen's hummingbirds in study regions. Determine the margin of error?
The researcher computes the sum of squares for groups as SSG = 40030 and the sum of squares for error as SSE = 414780. The numerical value of the ANOVA F statistic is
By using a level of significance of .10, is there evidence that the population mean weight of the candy bars is greater than 4.3?
The ANOVA table is given below,as well as a table of means and standard deviations for the three groups. Evaluate the t statistic for testing contrast
Public transportation and the automobile are two methods an employee can use to get to work each day. Samples of times recorded for each method are shown. Times are in minutes.
Calculate the probability of a value between 75.0 and 90.Calculate the probability of a value of 75.0 and less.
A Cornell university study of wage differentials between men and women reported that one of the reasons wages for men are higher than wages for women is that men tend to more years of work experience than women. Suppose the following results were ..
Estimate with 90% confidence the difference in the level of satisfaction with service between the two branches.
Health and Nutrition Examination Survey, suppose that weights of men now are normally distributed with mean of m =172 pounds and standard deviation of s = 29 pounds.
Create a 90% confidence interval for true mean amount of cholesterol in chicken eggs.
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