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Forecasters interest rate predictions over the period 1982 1990 were studied to see whether the predictions corresponded to what actually happened. The 2 Ã- 2 contingency table below shows the frequencies of actual and predicted interest rate movements. Research question: At ? = .10, is the actual change independent of the predicted change? (Data are from R. A. Kolb and H. O. Steckler, â??How Well Do Analysts Forecast Interest Rates?â? Journal of Forecasting 15, no. 15 [1996], pp. 385=394.)
Forecasted Change Rates Fell Rates Rose Row Total
Rates would fall 7 12 19
Rates would rise 9 6 15
Col Total 16 18 34
Assuming that the Styrofoam absorbs a negligibly small amount of heat and that no heat was lost to the surroundings, what is the specific heat capacity of the metal?
Construct ogive cure and numerical measures for the discrete data.
The lifetime of a super tough AAA battery is normally distributed wit mean of 28.5 hours and standard deviation of 5.3 hours. For a battery selected at random
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.
A SRS of size 16 drawn from a Normally Distributed population has a mean of 30 and a standard deviation, s, of 5. With 95% confidence, what is the interval that captures the true mean of the population?
Find the probability that an eligible voter selected at random will have the following characteristics.
An American put option to sell a swiss franc for dollars has a strike price of $0.80 and a time to maturity of one year. The volatility of the swiss franc is 10%
The gas price index for 1985 was 218.5 and the gas price index for 2000 was 276.8. If it cost $18.13 to fill your gas tank in 1985, how much would it have cost to fill the same tank in 2000?
An experimental study is designed to test the potency of a drug on 16 calves. Previous studies have shown that a 10-mg dose of the drug is lethal 7% of the time within the first 7 hours.
Our customers expect a call to be completed in 22 minutes. Using the data above, does either of our call centers meet this expectation with an alpha level of 0.05?
A certain police officer stops cars for speeding. The number of red sports cars she stops in one hour is a Poisson process with rate 4, while the number of other cars she stops is a Poisson process with rate 1.
Find out z values for 29 and 34 hours. What percent of garages take between 32 hours and 34 hours to erect?
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