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A random and indepently chosen sample of four bags of marbles each labeled 20 pounds, had weights of 20.5, 19.8, 20.8, and 20.0 pounds. Assume that the distribution of weights in the population is normal and answer the following:
The null and alternate hypotheses is: H? : µ = 20; H? : µ > 20- (I think this is correct)
* Calculate the p-value using t-distribution (exact value): 0.1577 (What I calculated)
* Calculate the test statistic using the formula and make sure to show your work.
* Complete a decision regarding the null hypothesis, and write your conclusion about the original claim. Round all values to the nearest thousandth. Use a 5% level of significance for the decision
Determine whether each of the distributions given below represents a probability distribution. Justify your answer.
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Develop a 99 percent confidence interval for the population proportion.
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In a survey of the 3000 boy scouts in the National Capital Area Council (NCAC), it is found that they have a mean weight of 135 lbs with a standard deviation of 15 lbs. How many of the boy scouts have weights between 120 lbs and 150 lbs.?
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The outcomes of the successive trials are assumed to be independent. Find the frequency function for the total number of attempts. What is the probability that player A wins?
How would one determine which combination of variables is the best (with statistical significance)? If that's not possible, can we show that one combination is statistically significantly worse than the others? What method would be used?
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