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Suppose that an individual stock's return is normally distributed with a mean of 10% and a standard deviation of 8%. What is the probability that the stock's return will be at least 16%? (please round your answer to 4 decimal places).
The mean life of your sample were more than 780 hours. What is the probability that you will not buy again from this manufacturer?
A standard for full credibility of 1,000 claims has been selected so that the actual pure premium will be within 10% of the expected pure premium 95% of the time. The number of claims has the Poisson distribution. Determine the coeffcient of vari..
Probability values based on normal distribution - old exit exam followed a normal distribution
The men took an average of 20.5 hours per year of personal time with a standard deviation of 2.75 hours. What is the pooled estimate of the variance? Round to three decimal places.
Their average age was 19.1 years with a standard deviation of 1.5 years. What is the best point estimate for the population mean?
If there are 81 fraternity members, how much should they buy so that using the normal approximation they are 93.32% sure they will not run out?
The company believes that it averages about the same weight per bag in each of two production lines. To test this idea, they will perform a hypothesis test to compare the two lines at the alpha level of 0.05. State the null and alternative hypothe..
When students go to the Health Center these days complaining of pain, they are asked to assess their pain using emoticons. One person's assessment is an example of what kind of data?
A business has 5 telephone lines. The first rings every minute on the average, the second every ½ minute, the third every 2 minutes, the fourth every 5 minutes,
Suppose that, from a population of 75 bank accounts, we want to take a random sample of six accounts in order to learn about the population. How many different random samples of six accounts are possible?
If life of wild pheasants follows a normal distribution with a mean of 9 months and a variance of 9, what percent of the population will be less than 11 months of age.
You read in a book about bridge that the probability that each of the four players is dealt exactly one ace is about 0.11. This means that in every 100 bridge deals each player has one ace exactly 11 times.
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