Construct a confidence interval
Scores on the sat mathematics test are believed to be normally distributed with mean µ. The scores of a random sample of three students who recent took the exam are 550, 620, and 480. Construct a 95% confidence interval for µ.
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Explain the basic idea for performing a hypothesis test, based on independent samples, to compare two population proportions.
For a sample of 15 comparable sized cities, is 0.45. At the 0.05 significance level is there a positive association in the population between the two variables?
Three machines I, II, and III manufacture 30%, 30%, and 40% respectively, of the total output of certain items. What is the probability that the item is defective?
Specifically, the marketing students were interested if exceeding the speed limit was related to social activity. They collected the following responses from 100 randomly selected students: The null hypothesis for the analysis is:
The probability that David hits the target is 1/5, one independent of the other. Find the probability that at least one of them hits the target.
What is the variable overhead efficiency variance for the month? (Input the amount as a positive value. Leave no cells blank - be certain to enter "0" wherever required.
Collections from Law Company's customers are normally 60% in the month of sale, 30% in the month following sale, and 8% in the second month following sale.
A new machine with a purchase price of $84,520.00, with a transportation cost of $9,797.00, installation costs of $5,031.00, and special aquistion fees of $1,572.00. Calculate a cost basis.
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