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A realtor took a random sample of records of sales of homes from the files maintained by the Albuquerque Board of Realtors. From this sample he recorded the amount paid in real estate taxes (in dollars), and the sales price of the home (in thousands of dollars). From this information the following output was created.
Compare your best difference to the result from an ordinary two-sample t-test between these groups. Comment the difference.
Find the sample size for the 95% confidence interval used to estimate the population proportion.
Use this information to determine the empirical probability that the next bird to visit the feeding station will be a dove.
A study sponsored by American Express Co. and the French government tourist office found that old American stereotypes about French unfriendliness weren't true.
Multiple choice questions based on F-distribution.
The data follow. Males Females 27 25 25 29 19 18 10 23 16 20 22 15 14 19 (a) What statistical test should be used to analyze these data?
Identify each of the random variables as continuous or discrete.
Random sample of 64 services is selected. Assume the population consists of 400 services. Find out the standard error of mean.
At 95% level of confidence, can we conclude that the babies using the Gibbs product gained less weight?
How many boxes must the processor sample to be 95 percent confident that the sample mean does not differ from the population mean by more than 0.2 pounds?
Based on the data, determine the 95 percent confidence interval evaluate for true population mean?
To demonstrate the effectiveness of the drug, a researcher selects a sample of n = 25 children diagnosed with the disorder and measure each child's attention span before and after taking the drug.
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