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Designing Theater seats- In the course of sesigning theater seats, the sitting heights(in mm) of a simple random sample of adult women is obtained, and the results are listed below(based on anthropometric survey data from Gordon, Churchill, et al). Use the sample data to construct a 95% confidence interval estimate of the σ, the standard deviation os sitting heights of all women. Does the confidence interval contain the value of 35 mm, which is believed to be the standard deviation of sitting heights of women?
Calculate the standard error. With 95% confidence, find out the margin of error?
A survey conducted by the American Automobile Association of 64 families of size four vacationing in Niagra Falls resulted in an average amount spent per day of $252.45. Assume the population standard deviation of amounts spent per day is estimate..
(a) State the hypothesis for a right-tailed test. (b) Obtain a test statistic and p-value assuming equal variances. Interpret these results. (c) Is the difference in mean scores large enough to be important?
Of the next 15 people that invest in this project, what is the probability that 5 or less people will result an annual net cash flow of at least $100,000.
Construct a 95% confidence interval estimate of the population mean life of the light bulbs.
Sun Microsystems has approximately 50% of the high-end Unix machines market with its closest competitor being IBM. Suppose that 15 firms were in the market to purchase a high-end Unix machine. Assume that these firms listened to sales pitches by a..
The bank wants to find out the waiting time of their customers during the Friday evening hours from 5pm to 8pm. Using the data in ungrouped form, compute the Standard Deviation, using the computational formula.
Explain the ANOVA output table values:
Assume you are given data from a survey showing the IQ of each person interviewed and the IQ of his or her mother. That is all the information you have.
If the lowest score you can earn and still be eligible for employment is an 84, what is the mean score for the exam? Round your answer to the nearest tenth.
A "random survey" was conducted of 3274 people of the "microprocessor generation" (people born since 1971, the year the microprocessor were invented). It was reported that 48% of those
A logistic regression model was used to assess the association between CVD and obesity. P is defined to be the probability that the people have CVD.
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