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Suppose that a box contains a large number of chips of three different colors, red, brown, and blue; and that it is desired to test the null hypothesis Ho that chips of the three colors are present in equal proportions against the alternative hypothesis HI that they are nor present in equal proportions. Suppose that three chips are to be drawn at random from the box, and that Ho is to be rejected if and only if at least two of the chips have the same color.
(a) Determine the size of the test.
(b) Determine the power of the test if 1/7 of the chips are red, 2/7 are brown, and 4/7 are blue.
Select an article from a news magazine or research journal where data is displayed in a pie or bar chart. Describe the data displayed in the chart and what conc
Come up with a survey: Pick a population. Come up with 4 variablesà 2 Quantitative & 2 Qualitative (make up numbers)
Use the method of least squares to estimate the line, E(y) = β0 + β1x. Interpret the β estimates in the words of the problem.
A claim from the National Lifeguard Association is that the population proportion of drowning deaths of children attributable to beaches is 0.25. A sample of 700 drowning deaths of children in U.S. last year showed that 30% of them were attributab..
X is a Bernoulli random variable with unknown success probability. Using 100 independent samples of X find a confidence interval estimate of p with significance level 0.99. If M100(X) = 0.06, what is our interval estimate?
Suppose that an observational study showed that students who got at least 7 hours of sleep performed better on exams than students who got less than 7 hours of sleep. Which of the following are possible confounding variables, and which are not?
Its probability distribution is as follows. Find the standard deviation of the number of houses sold. A. 2.25 B. 2.62 C. 1.62 D. 6.86 E. 4.45.
Hooded rats: social play times. How does social isolation during a critical developmental period affect the behavior of hooded rats? Psychology students assigned 24 young female rats at random to either isolated or group housing, then similarly as..
a manager is trying to decide whether to buy one machine or two. if only one is purchased and demand proves to be
evaluate completely the following statement the issue is not whether there is variation but whether the variation is
Profitability at a bank is declining as customers are shifting to other banks. As a researcher, identify the problem (root cause of the symptom) through a scientifically crafted research proposal.
Construct a scatter plot of the data. Describe the relationship between average finish and winnings.- Find the sample correlation coefficient. Is the value of r consistent with your interpretation in part (a)? Why or why not?
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