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The New York Stock Exchange (NYSE) consists of listing of approximately 1,500 companies, which offer shares of company stock to the public. Stockbrokers are interested not only in the individual stocks, but also in general trends established by the market as a whole. They often base inferences upon the daily closing prices of the group of 30 NYSE stocks that comprise the Dow Jones Industrial Index.
a. Identify the population, the variable of interest, and the sample in the context of this problem.
b. What are some inferences of possible interest to a stockbroker? How would the reliability of the inferences be assessed?
Formulating null and alternative hypothesis to test the claim averaging about $5000.
Recall that the trash bag manufacturer has concluded that its new 30 gallon bag will be the strongest such bag on the market if its mean breaking strength is at least 50 pounds.
Simulate both one-and two-teller systems, calculate waiting time, average queue length, and percentage utilization for each system.
Suppose the probability that a federal income tax return conatins an arithemetic error is 0.2. If 10 federal income tax returns are selected at random,
Find the probability that 4 of the 5 committee members belong to a union.Find the probability using hypergeometric distribution.
Based on this sample, is Moe correct in his assertion? Write up formal commentary of results of your test.
Follow the conventions as described in the general guidelines for writing up Special Problems.
An electronic test equipment manufacturing company markets a certain piece of specialty equipment. The company has several competitors who currently market similar pieces of equipment.
The Rathburn Manufacturing Company makes electric wiring, which it sells to contractors in the construction industry. Approximately 900 electric contractors purchase wire from Rathburn annually.
Farmers know that driving heavy equipment on wet soil compresses the soil and injures future crops. Here are data on the "penetrability" of the same type of soil at 2 levels of compression.
Where S, A, and R are measured in dollars per week. Vanguard's marketing director is comfortable using parameter estimates that are statistically significant at the 10% level or better.
Should Martha use an independent-samples t-test or a related samples t-test? Explain your answer.
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