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A real estate agent in the coasatal area of Georgia wants to compare the variation in the selling price of homes on the oceanfront with those one to three blocks from the ocean. A sample of 21 oceanfront homes sold within the last year revealed the standard deviation of the selling price was $45,600. A sample of 18 homes, also sold within the last year,that were one to three blocks from the ocean revealed that the standard deviation was $21,330. At the .01 signficance level, can we conclude that there is more variation in the selling prices of the oceanfront homes?
The dimension is supposed to be 224 mm and the variance is unknown for the manufacturing process. Is there evidence that the mean dimension is not 221 mm? Assume the population is normally distributed. Use a = 0.05 and the critical value value met..
A flour mill produces flour in small bags before distributing them to wholesalers. The average weight of each bags is 8 kg with a standard deviation of 0.5 kg.
Prepare an analysis of your selected article. Start by identifying and summarizing the hypothesis described in the article. Then explain whether the hypothesis was rejected or accepted, and what the implications of this finding are for the study.
Since you have a significant effect you would need to run post-hocs here. Please determine the appropriate post-hoc for this situation and report the results in proper APA format.
Using a sample of size n=120, what is the standad deviation of our estimator P? What is the probability that the sample proportion will be at least 0.45?"
Averaging 204 pins with a standard deviation of 24.9, can one conclude at a level of significance of .01 that the new ball has improved his game?
If the average tax payer who makes $140,000 per year owes the government $18,200 with a standard deviation of $1500, and the IRS receives a 1040 tax documents from a customer who earned $140,000 that claims he only owes $12,000, should the IRS sus..
Create a 90% confidence interval for true mean amount of cholesterol in chicken eggs.
A business finds the average cost required to complete a project is $416 with a standard deviation of $57. A sample of 36 project cost reports was selected at random.
She asked her assistant for a 95% confidence interval, approximately how large a sample did her assistant use to determine the interval estimate?
Plot CEO salaries against the net profit of their respective companies, do you expect to find a linear correlation between the two?
At the .05 significance level, can Macaray conclude that the population means are different? Note that you should show all 5 steps in the test of hypothesis.
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