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In an analysis in investigating the usefulness of pennies, the cents portion of 100 randomly selected credit card charges from the author are reported. They have a mean of 47.6 cents and a standard deviation of 33.5 cents. If the amounts from 0 cents to 99 cents are all equally likely, the mean is expected to be 49.5 cents and the population standard deviation is expected to be 28.866 cents. Use a .01 significance level to test the claim that the sample is from a population with a standard deviation equal to 28.866 cents. If the amounts from 0 to 99 cents are equally likely, is the requirement of a normal distribution satisfied? If not, how does that affect the conclusion?
Suppose that a random sample of 51 passengers showed an average total weight of 200 pounds with a sample standard deviation of 59.5 pounds. What is the value of the test statistic?
Compose a 350 to 700-word summary report of your findings to the researcher and owner of the restaurant in which you Identify evidence, if any, of the researcher's claim. Perform a one- or two-tail test on the data provided,
Running a study comparing 3 different products on five different experimental visits. The same subjects are used for each visit and the same tests are carried out each time on all 3 products. What is the best way to radomise the presentation of the 3..
At the .01 significance level, is there a relationship between job pressure and age?
You will investigate four different scenarios of population growth also decline in this town. Graph the model as well as investigate it by four different growth models.
Suppose the counselor found the sum of squared deviations from the mean of the sample to be 135. Given that he tested 10 people, what would be the estimated population variance?
A lot of n items comprises k defectives, and m are chosen randomly and inspected. How must the value of m be selected so that probability that at least one defective item turns up is .90?
The annual real return Y on the Diversified International Fund has mean 11% and standard deviation 17%, and the correlation between X and Y is 0.6. The return on Linda's portfolio is R = 0.7X + 0.3Y. What are the mean and standard deviation of R?
the population of a certain city is now 74000 people. if the population doubles every 25 years what will the
You manufacture and sell an iron rod whose electrical conductivity is supposed to be 10.1. You plan to make 6 measurements of the conductivity of a rod you plan to sell.
Each scenario involves randomly selecting n i observations from four, independent, Normal populations as described.
the distribution of the sat scores in math for an incoming class of business students has mean of 580 and standard
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