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1. According to Money, the average price of a home in Albuquerque is $165,000.6 Suppose that the reported figure is a sample estimate based on 80 randomly chosen homes in this city, and that the population standard deviation was known to be $55,000. Give an 80% confidence interval for the population mean home price.
2. A mining company needs to estimate the average amount of copper ore per ton mined. A random sample of 50 tons gives a sample mean of 146.75 pounds. The population standard deviation is assumed to be 35.2 pounds. Give a 95% confidence interval for the average amount of copper in the "population" of tons mined. Also give a 90% confidence interval and a 99% confidence interval for the average amount of copper per ton.
3. A new low-calorie pizza introduced by Pizza Hut has an average of 150 calories per slice. If this number is based on a random sample of 100 slices, and the population standard deviation is 30 calories, give a 90% confidence interval for the population mean.
An electrical firm manufactures electric light bulbs that have a length of life which is normally distributed with mean and standard deviation equal to 500 and 50 hours, respectively.
What is the standard error of measurement for the test? What range of scores would you expect an individual who made 54 on the test to make on another test of similar difficulty? Assume you want to be 68% accurate in your estimate.
More critical values. You have an SRS of size 30 and calculate the one-sample t statistic. What is the critical value t* such that t has probability 0.025 to the right of t*?
almost all medical schools in the us require students to take the mcat. to estimate the mean score mu of those who took
Determine the distributions given below represent a probability distribution. Justify your answer.
Suppose A: (V, | * |) ---> (W, | * |w) is a linear map between normed spaces, and there is a number R E R such that |A(v)|w
The registrar of a college with a population of N=4,000 full-time students is asked by the president to conduct a survey to measure satisfaction with the quality of life on campus.
a spymaster has a network of 7 operatives whom he pays out of a slush fund containing 20000. for accounting reasons his
the following data show the number of fruit fly killed at varying concentrations of nicotine.the number of ies killed
suppose that the average number of airline crashes in a country is 1.9 per month.a what is the probability that there
At the 0,05 level, can we conclude that women think men are less kind, gentle, and thoughtful in the later survey compared with the earlier one?
Averaging 204 pins with a standard deviation of 24.9, can one conclude at a level of significance of .01 that the new ball has improved his game?
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