Population of normally distributed aptitude scores
In a population of normally distributed aptitude scores of 1000 academy students with mean 70 and Standard deviation 10, how many score below 95?
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Out of curiosity, you look at authors of textbooks for your current courses. There're 12 authors in all. Would you be surprised if none of names of these authors were among the 10 most common? Provide a probability to support your answer. Your ans
If the probability of a house being burgled in a year is 1 in 100, the probability of it being struck by lightning in a year is 1 in 1,000 and the probability of it being affected by flash flood in a year is 5 times greater than that of being stru
Calculate the probability that the avalanche will take place between detonations of charges 10 to 15 inclusive.
In a certain population, 0.1% of people are infected by HIV virus. A test is proposed to determine the virus carriers. For an infected person, the test gives positive result in 99% of cases; for an uninfected person, the test gives positive result
New york state has found that 30% of all consumers complaints are valid. If the state received 6000 complaints last year, about how many of them are expected to be valid? Find the standard deviation
A certain system has two components. There're 7 different models of first component and 11 different models of second. Any first component can be paired with any second component. A salesman should choose 2 of the first component and three of the
A salesman should choose 2 of the first component and 3 of the second to take on a sales call. How many different sets of components can the salesman take?
For the normal distribution curve with mean of 6 and a standard deviation of 5, which of the following ranges of the variable will define an area under the curve corresponding to a probability of approximately 34%?
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