
the following table shows the 2011 murder rates (per100,000 people) for fifteen U.S. cities. find only the appropriate measures of central tendency CITY murder rate per 100,000 NY city 6.4 Los Angeles 7.6 Chicago 15.2 Houston 11.8 Philadelphia 19.6 Las Vages...

8.4 (center X) Refer to Muscle mass Problem 1.27. Secondorder regression model (8.2 which is Yi = B0 +B1Xi + B11x_i^2x2i + i)) with independent normal error terms is expected to be appropriate. There is a calculated mean of 59.98. Please use this to center X (age). Plot the fitted...

mean

12. Each semester the student in the college of business at State University must have their course schedules by the college advisor. The students line up in the hallway outside the advisor s office. The students arrive at the office according to the following probability distribution....

Suppose you are an expert on the fashion industry and wish to gather information to compare the amount earned per month by models featuring Liz Claiborne attire with those of Calvin Klein. Assume the population standard deviations are not the same. The following is the amount ($000) earned per...

The manufacturer of a laser printer reports the mean number of pages a cartridge will print before it needs replacing is 12,325. The distribution of pages printed per cartridge closely follows the normal probability distribution and the standard deviation is 695 pages. The manufacturer wants to...

(c)Briefly explain why you select this time series model. (d)Develop the weekly total Regression model and seasonal index of weekdays

Using zscores, a population with mean = 37 and standard deviation = 8 is standardized so that the new mean is mean = 50 and standard deviation = 10. How does an individual's zscore in the new distribution compare with his/her zscore in the original population?

f7

electric utility customer service representative answers a call is 210 seconds. The Gigantic Kilowatt Energy Company randomly sampled 30 calls and found that, on average, they were answered in 183 seconds with a population standard deviation of 30 seconds. Can the company claim that they are...
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 1. A school administrator wonders if students whose first language is not English score differently on the math portion of the sat exam than students whose first language is English. The mean SAT math score of students whose first language is english is 516 on the basis of data obtained from the college board. A simple random sample of 20 students whose first language is not English result in a sample mean SAT math score of 522. SAT math score are normally distributed with a population standard deviation of 114. Why is it necessary for SAT math scores to be normally distributed to test the hypothesis?
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