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An investor is trying to decide whether to invest in a given stock, but is worried about the volatility of the investment. If the investor is very certain that the volatility (as measured by the standard deviation) is greater than 16% then the investor will choose a different investment option. In a sample of the previous 81 days reveals that the standard deviation of the investment is 20%. When testing the hypothesis (at the 1% level of significance) that the standard deviation is higher than 16%, what is the test statistic? (be careful on this) (please round your answer to 2 decimal places)
Is this conclusion justified? Explain and If your answer to part (a) is no, what other information would be needed before a final conclusion could be drawn?
What is the probability that a randomly selected eagle's wingspan is exactly 77 inches? Explain your answer. What is the probability that a randomly selected eagle's wingspan is 77 inches or less?
two manufacturing processes are used.process 1 151 150 154 149 150 148 144 148 152 151 150 149 152 151process 2 152 151
a major issue facing many states is whether to legalize casino gambling. suppose the governor of one state believes
find and interpret the 98 confidence interval for the standard deviation of the time that it takes a telephone
Write complete linear programming model (All three parts) to find out the number of items to be transported from models A, B, C, and D to nodes 1 and 2 at minimum cost.
1.At a local university, the Student Commission on Programming and Entertainment (SCOPE) is preparing to host its first rock concert of the school year.
However, the mean ounces of ?ll μ may change from day to day, because of change of operator or adjustments in the machine. If n = 55 observations on ounces of ?ll are taken on a given day, ?nd the probability that the sample mean will be within 0...
a random sample of 16 students from the student body of a large university had an average age of 25 years and a sample
it has been shown that people drive 5 - 10mph faster than the posted speed limit on a highway. it has been thought that
four automobiles have entered bubbas repair shop for various types of work ranging from a transmission overhaul to a
Create the indicated confidence interval for population mean using (a) t-distribution. (b) If you had incorrectly used normal distribution, which interval would be wider?
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