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According to a website about salaries, the national average salary as of October 2003 for a human resources clerk was $29,932. We assume that the annual salaries for clerks are normally distributed with a standard deviation of $1,800. (Give your answers correct to two decimal places.)
(a) Find the percentage who earn less than $26,612.
(b) Find the percentage who earn more than $31,556.
In a sample of 60 mice, a biologist found that 46% were able to run a maze in 30 seconds or less. Find the 99% limit for the population proportion of mice who can run that maze in 30 seconds or less?
The population variances are 4.6 and 5.0 respectively. Using a level of significance of .05, is there evidence that the dual degree students are receiving lower grades?
a frequency distribution was constructed for the ages of all 25 of the ceos of the company x. to answer the parts of
The two cars drove a combined total of 1450 miles, and the sum of their fuel efficiencies was 40 miles per gallon. What were the fuel efficiencies of each of the cars that week?
Our nation's focus on crime has made a gradual shift away from drugs to what many perceive to be the major problem facing our criminal justice system today: juvenile crime,
assume you are building a system aircraft etc. for a customer but using the best technology available. you cannot
q1. through years of careful observation you have begun to suspect that how vocal cats are is somehow related to the
According to the historical data, the life expectancy in the United States is equal to the life expectancy in Japan. A new study has been made to see whether this has changed.
Enzymatic method: 13.1, 12.7, 12.6, 13.3, 13.3. GC method: 13.5, 13.3, 13.0, 12.9. Does the enzymatic method give the same value as the GC method at the 95% confidence level?
fuel economy estimates for automobiles built one year predicted a mean of 25.8 mpg and a standard deviation of 7.2 mpg
The probability of a z falling between two points equidistant from the mean, one to the left of the mean and the other to the right og the mean is 99% what are the z ranges.
Xerox Claims their copier is the same speed as Cannon's copier. The average speed of cannon's copier is 27 copies per minute. A test of 49 runs is done on the Xerox copier giving a sample mean X = 26 and a sample standard deviation s = 2.65.
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