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An agricultural researcher plants 25 plots with a new variety of corn that is drought resistant and hence potentially more profitable. The average yield for these plots is x = 150 bushels per acre. Assume that the yield per acre for the new variety of corn follows a normal distribution with unknown mean ? and that a 95% confidence interval for ? is found to be 150 ± 3.29. Which of the following is true?
A) A test of the hypotheses H0: ? = 150, Ha: ? ? 150 would be rejected at the 0.05 level.
B) A test of the hypotheses H0: ? = 150, Ha: ? > 150 would be rejected at the 0.05 level.
C) A test of the hypotheses H0: ? = 160, Ha: ? ? 160 would be rejected at the 0.05 level.
D) All the above.
question a researcher conducted and experiment on the effects of a new drug on depression. the researcher had a
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The average salary for a certain profession is ?$75,500. Assume that the standard deviation of such salaries is ?26,000. Consider a random sample of 66 people
q1. a chi-square test for independence with 8 degrees of freedom results in a test statistic of 18.21. usingthe
Gary is at the top of Gail's preference list, and Gail is at the top of Gary's preference list. Prove that in every stable matching Gary and Gail are matched to each other.
a. What percentage of series were located in other settings besides California and New York?
Suppose that $126,000 is to be allocated for advertising, research, and investment in the ratio 10:4:2. How much money will be allocated for each?
A basketball player makes 60% of the free throws that he attempts, except that if he has just tried and missed a free throw then his chances of making a second.
What is the mean weight of my ancient gold coins - How do you consider this collection, a population or a sample - However, some formats are better than others in the sense that they convey important and relevant information in the given data set.
On a Venn diagram, depict the set of elements that are in subsets A or B but not in both. Also write this as a subset involving unions and intersections
How is the null hypothesis chosen (why is it null)? What is the importance of rejecting the null hypothesis in relation of the sample to the population?
Reconsider Prob. 22.6-4. Suppose now that more careful statistical analysis has provided new estimates of the probability distributions of the radii of the shafts and bushings.
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