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a) 420 are opposed to an income tax increase. Construct a 95% confidence interval for the proportion of people in the population opposed to this tax increase. Interpret your result.
b) The internal auditing staff of a local lawn-service company performs a sample audit each quarter to estimate the proportion of accounts that are current (between 0 and 60 days after billing). The historical records show that over the past 8 years 70 percent of the accounts have been current. Determine the sample size needed in order to be 99 percent confident that the sample proportion of the current customer accounts is within .03 of the true proportion of all current accounts for this company.
a. What are the risks of using Harry Potter 7 data in predicting your new demand curve for the Harry Potter sequel? (15%)
Describe an appropriate model for the number of cider apples that may come from that tree. Justify your model.
Compute the value of the sample correlation coefficient between weekly sales and shelf space. Is the correlation between weekly sales and shelf space significant at the .01 level of significance? What is the estimated regression equation?
What is the standard deviation of the number of children they would expect to have until the first blue-eyed child?
We use statistical software to do the prediction and obtain the following output. 95% confidence interval for the average profit of companies with 500 units of sales is?
Translate the following arguments into symbolic form.- Either funding for nuclear fusion will be cut or if sufficiently high temperatures are achieved in the laboratory, nuclear fusion will become a reality.
What is the probability of getting Full-House, which is two of a kind and three of kind, in the first hand (Example 2 Aces and Three Queens)?
A dean has found that over the years, about 15% of students who begin their college work in her program do not finish. This year, 90 students will begin her program; define P^ to be the proportion who will finish.
Solve the inequalities for the following exercises. Express solution set using interval notation, and graph the solution set on a number line
Store used ANOVA to test if mean sales for each credit card were equal. What are the degrees of freedom for F statistic?
Formulate and use linear programming to solve the following problem. A firm wants to determine how many units of each of two products (products X and Y).
The space shuttle, shown in Figure P9.9 (a), carries large payloads into space and returns them to earth for reuse [19]. The shuttle uses elevons at the trailing edge of the wing and a brake on the tail to control the flight during entry.
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