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In a national survey, n = 1000 randomly selected adults are asked how important religion is in their own lives (very, fairly, or not very) and whether they approve or disapprove of same-sex marriage.
Write null and alternative hypotheses about the relationship between the two variables in this situation. Make your hypothesis statements specific to this situation.
A mean score of 600 and a standard deviation of 100. What credit score defines the top five percent of scores. Within what range would 85% of credit score fall.
Due to all the unceratinties in government health care legislation, shouldice would like to justify any expansion within a five-year time period. How would I set this problem up?
A random sample of n = 4 scores is selected from a population with µ = 80 and σ = 20. On average, how much difference would you expect between the sample mean and the population mean?
Consider a level α = .10 test of H0 (8.1) versus the alternative τ > 0 based on K. How many bivariate observations (n) will we need to collect in order to have approximate power at least .95 against an alternative for which τ = .6?
How large a sampl.e is needed to estimate the true proportion of home owners who have vegetable gardens to within 4 percentage points with 95% confidence?
Test for the existence of a nonzero linear correlation in the "population" of prices of the two stocks. For your sample, use as many daily prices as you can.
Lowess smoothing becomes difficult when there are many predictors and the sample size is small. This is sometimes referred to as the "curse of dimensionality." Discuss the nature of this problem.
Determine the best replacement policy over the next five years?
In your workplace? Elsewhere in the business sector? In your education (during your UOPX degree program)? In politics? Explain your response.
Suppose x has a distribution with μ = 29 and σ = 22.(a) If a random sample of size n = 41 is drawn, find μ, σ and P(29 ≤ ≤ 31). (Round σ to two decimal places and the probability to four decimal places.)
An investor wants to assess at confidence level of 98% if a medicament can improve the marks of students. He notices that for the following daily dozes: 2,2.5,3,4.5,7 mg, the improvement over the students that studied the same but took no mental b..
What is the probability that a sample mean will be within plus-or-minus two of the population mean for each of the following sample sizes?
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