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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 125. The individuals who exceed 780 on this test are considered to be potential leaders. What proportion of the population are considered to be potential leaders? Round your answer to at least four decimal places.
1. For four observations, it is given that mean is 6, median is 4, and mode is 3. Find the standard deviation of this sample. 2. The data given below pertain to a random sample of disbursements of state highway funds (in millions of dollars), to di..
what is the percentage of the total area under the normal curve within plus and minus 1.6 standard deviations of the
Which of the following assumptions for inference about a proportion using a confidence interval are violated,
the probability density function for the diameter of a drilled hole in a metal shop plant is 10e-10x-5 for x gt 5mm.
Find the probability that at most 5 defective bolts will be found in a box of 200 bolts if it is known that 2 per cent of such bolts are expected to be defective.
a study of college freshmens study habits found that the time in hours that college freshmen use to study each week is
Suppose that network breakdowns occur randomly and independently of each other on an average rate of three per month. (a) What is the probability that there will be just one network breakdown during December? Interpret.
The outcome of the toss is announced to II. Then II must guess whether I chose the fair or biased coin. If II is correct there is no payoff. If II is incorrect, she loses 1. Draw the game tree.
Convincing evidence to support the claim that fewer than half of adult Americans can name at least one justice currently serving on the Supreme Court.
Why do you use the chi-square statistic? Explain. What type of data is used with chi square analysis? Explain. What are the hypotheses in a chi-square test for independence? Explain.
a standardized test has a mean of 104 and a standard deviation of 16. we want to be 98 certain that we are withing 4
Assume that you are the owner of CDA Elevators a Large Regional Elevator Company that constructs and repairs elevators for new and existing construction. Assume further that you are trying to decide if you want to extend your business by adding an..
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