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Highway safety engineers test new road signs, hoping that increased reflectivity will make them more visible to drivers. Volunteers drive through a test course with several of the new- and old-style signs and rate which kind shows up the best.
a) Is this a one-tailed or a two-tailed test? Why?
b) In this context, what would a Type I error be?
c) In this context, what would a Type II error be?
d) In this context, describe what is meant by the power of the test.
e) If the hypothesis is tested at the 1% level of significance instead of 5%, how will this affect the power of the test?
f) The engineers hoped to base their decision on the reactions of 50 drivers, but time and budget constraints may force them to cut back to 20. How would this affect the power of the test? Explain.
Describe some ways monasticism aided the growth and prosperity of political empires. You are welcome to use two other sources besides your text. Make sure to cite your sources. Please do not use Wikipedia as a source.
Probability of 0.3, and is a draw with probability of 0.3, independently of the previous games. What is the probability that Fischer wins the match?
if the population means and common variance were known, what would the value of MSBG be if it were giving perfectly accurate information? How does this differ from the value estimated by MSWG?
an experiment was designed to estimate the mean difference in weight gain for pigs fed ration a as compared with those
Did anything surprising or unexpected happen in your results for this experiment?
question on saturdays cars arrive at sami schmitts scrub and shine car wash at the rate of 8 cars per twenty minute
Create a probability model for the amount you win at this game.- Find the expected amount you'll win.- How much would you be willing to pay to play this game?
The Sony corporation produces a Walkman that requires two AA Batteries. The mean life of these batteries in this product is 35.0 hours. The distribtion of the battery lives closely follows the normal probability distribtion with a standard deviati..
Drivers stop to fill up their cars at a service station according to a Poisson process with rate λ = 15 per hour. The service station has only one gasoline pump, and there is room for only two waiting cars. We suppose that the average service time..
Estimate demand for the next four weeks using a four-week moving average as well as simple exponential smoothing with a = .01. Evaluate the MAD, MAPE, MSE, bias and TS in each case. Which of the two methods do you prefer? Why?
Suppose the weights of pucks produced at a factory are normally distributed with a mean of 5.75 ounces and a standard deviation of .11 ounce. What percentage of the pucks produced at this factory cannot be used by the National Hockey League?
a computer center has three printers a b and c which print at different speeds. programs are routed to the first
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