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A food chain company based in Florida wants to expand in Georgia. You, as a part of the marketing team, are required to find the popularity of fast food among the younger generation. What method is best suited for such a survey? Draw the sample using the random number table and bring out the rationale of the procedure.
Stanford Binet IQ scores have a mean of 100 and a standard deviation of 15. Albert Einstein reportedly had an IQ of 160. Convert Einstein's IQ score to a z score.
After the presidential debates, a random sample of 1200 voters showed that 540 favored the Democratic candidate; 480 were in favor of the Republican candidate; 40 were in favor of the Independent candidate, and 140 were undecided. At a 1% level of..
A rental agent claims that the mean monthly rent, mu, for apartments on the east side of town is less than $725. A random sample of 13 monthly rents for apartments on the east side has a mean of $724
In a nationwide study directed by UMUC Teaching Hospital, 780 persons with stable heart disease were treated. Half of the subjects were treated with drugs and half underwent bypass surgery.
When we say we have confidence level of 95% what do you believe our "margin of error" is?
What are the differences between probability distribution functions and probability density functions? Why do we care?
A sports researcher gave a standard written test of eating habits to 12 randomly selected professionals, four each from baseball, football, and basketball. The results were as follows:
Find the test statistic value for testing the equality of proportion variances.
Compute the variance and standard deviation
This model is fit to the data using the method of least squares using statistical software, and the following parameter estimates and their standard errors are obtained.
Give a brief definition and an example of the following: What does the correlation coefficient r describe? What about r squared?
What is the 95% confidence interval estimate for the difference between the mean reflectivity reading for Paint A and Paint B? Please complete the blank: "we can be 95% confident that the true difference between the actual means is?
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