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Two comparable cars of BMW and Mercedes are BW 330 cci and the Mercedes CLK 320. As of 2006, the average manufacturer's suggested retail price for a 330 cci was $37600 as compared to the $45750 for a CLK 320. The dealer prices however are not consistent. The dealer prices for CLK 320 follow a normal distribution with a mean of $45750 and a standard deviation of $2981. The dealer prices for 330 cci are normally distributed with a mean of $37600 and a standard deviation $2367. What percentage of BMW dealers are pricing the 300 cci at more than the average price for a CLK 320? What percentage of Mercedes dealers are pricing a CLK 320 less than the average price of a 330 cci?
The gas mileage rates for various CLK cars are uniformly distributed over a range from 24 miles per gallon (mpg) to 34 mpg. What proportion fall between 26 to 30 mpg range? Gas mileage rates for 330 cci are uniformly distributed between 25 mpg to 35 mpg? What proportion of 330 cci cars fall between 26 to 30 miles per gallon range? Compute the percentage of each of the car models that get 30 or more mpg.
The Gallup organization conducted a telephone survey with a random selected national sample of 1005 adults, 18 years and older. The survey asked the respondents, "How would you describe your own physical health at this time? "Response categories w..
Leasing agents from the Triangle Mall Management Corporation have suggested that Sunflowers Apparel considered several locations in some of Triangles newly renovated lifestyle malls that cater to shoppers with higher than mean disposable income.
In order to estimate the proportion of families who prefer female baby-sitters to male baby-sitters with an error of at most 8 percentage points and with at least 95 percent confidence, how large a sample should be taken?
How could the engineer increase the accuracy of the interval without changing the level of confidence?
Determine the area under the standard normal curve between z = 0 and z = 3. Determine the area under the standard normal curve to the right of z = 1. Determine the area under the stanard normal curve to the left of z = 1.5
Discuss the main assumption for using a chi-square test. Find a research article that uses chi-square and explain why it was the right test and how the assumption plays into it.
Explain the difference between testing a single mean, testing the difference between two means from an "independent sample" and testing mean differences from a "dependent sample".
Tom Smith wants to test the hypothesis that adult men have a mean weight that is greater than 150 pounds. Tom surveys the adult male members of his family and obtains 40 sample values
The trend line y = 0.70 + 0.005t was calculated from quarterly data for 1999 -2003, where t = 1 for the first quarter of 1999. The seasonal indexes computed from the trend line for the four quarters of the year 2004 were .85, 1.05, 1.15, and .80, ..
Assuming that all other variables are held constant, explain how the value of z influenced by each of the following:
Construct a cross tabulation to examine the relationships between the two nominal/ordinal level variables. Assume that you selected a random sample of two hundreds cases and collected data on these cases.
Suppose the weight of a product is normally distributed with a mean of 1.5 and a variance of 0.2. What percentage of products will have weights within +/- 3 standard deviations? Critically discuss the lower and upper limits bounding 50% of product we..
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