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An assignment of probability must obey which of the following?
A. the probability of any event must be a number between 0 and 1, inclusive.B. the sum of all the probabilities of all outcomes in the sample space must be exactly 1.C. the addition rule for disjoint events.D. all of the above.
What is the standard error of measurement for the test? What range of scores would you expect an individual who made 54 on the test to make on another test of similar difficulty? Assume you want to be 68% accurate in your estimate.
An aptitude test is designed to measure leadership abilities of the test subjects. Suppose that the scores on the test are normally distributed with a mean of 580 and a standard deviation of 120.
In a poll of 1,004 adults, 93% indicated that restaurants and bars should refuse service to patrons who have had too much to drink. Construct the 90% confidence interval for the proportion of all adults who feel the identical way.
Suppose the distribution of amounts purchased follows normal distribution. For sample of 50 customers, reply the following questions. Determine the probability the sample mean is at least $25.00?
Give an example of two variables that probably have a significant linear correlation coefficient, but one variable does not necessarily cause the other.
A survey found that women's heights are normally distributed with mean 63.6 in and standard devistion 2.5 in. a branch of the military requires women's heights to be between 58 in and 80 in. What is the percentage of women who meet the height requ..
Prof Hardtack gave three exams last semester in a large lecture class. The standard deviation = 7 was the same on all three exams, and scores were normally distributed.
Construct a 95% confidence interval estimate for the population proportion of administrative professionals who prefer cash bonuses.
Suppose that 40% of participants consume caffeine and smoke. if 8 participants are evaluated, what is the probability that: a) Exactly half of them consume caffeine and smoke?
The average gasoline price of one of the major oil companies in Europe has been $1.25 per liter. Recently, the company has undertaken several efficiency measures in order to reduce prices.
The time until a component is taken out of service is uniformly distributed on 0 to 8 hours. Two such independent components are put in series, and the whole system goes down when one of the components goes down.
Stock A has an expected return of 12% and a standard deviation of 40%. Stock B has an expected return of 18% and a standard deviation of 60%. The correlation coefficient between Stocks A and B is 0.2.
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