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An aspirin manufacturer has designed the child- proof cap on its bottles so that it must be pressed down before it can be turned and removed. A consumer maga- zine has randomly purchased 15 bottles of the company's aspirin for analysis in a feature article on pain relievers and their packaging. Among the analyses is a test of how much force is required to depress the cap on each bottle. The standard deviation for the bottles made by this man- ufacturer is found to be 7.2 grams. From the magazine's findings, and assuming a normal distribution, determine the 95% confidence interval for the population standard deviation of the force required to depress the firm's aspi- rin bottle caps.
Is it appropriate to use the methods of this section to find a 95% confidence interval for the mean DBH of all trees in the Wade Tract? Explain why or why not.
Using the SPSS, calculate a simultaneous multiple regression with SES, age, and optimism as the independent variables and longevity as the dependent variable.
The price of XYZ Corporation stock is normally distributed all through the year with mean of $42.00 per share and a standard deviation of $2.25 per share. Suppose that the stock is traded 240 days out of the year.
Of the nine members of the board of trustees of a college, five agree with president on a certain issue. The president selects three trustees at random and asks for their opinions. What is the probability that at least two of them would agree with..
A building developer has the opportunity to purchase several acres of land that is divided up into several lots for building single-family homes.
Recent studies indicate that the typical 50-year-old woman spends $350 per year for personal-care products. The distribution of the amounts spent is positively skewed.
the monthly incomes for 12 randomly selected people each with a bachelors degree in economics are shown on the
In the following situations, decide whether you would use a personal interview, observation, mailed questionnaire or telephone interview. Give your reasons.
Let X be the cost of the sofa. What is the average cost of a sofa if the advertised sofa is $250 and the more expensive sofa is $ 375?
Compute and interpret a MANOVA examining the effect of whether or not students completed the extra credit project on the total points for the class and the previous GPA.
Use a scatter plot to determine the relationship between the x values and the y values.
What is the difference between accrual and cash accounting? When might an accountant use cash basis accounting without violating generally accepted accounting principles?
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