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Among 110 students in a probability class, on a three-question exam, 30 get question 1 incorrect, 40 get question 2 incorrect, and 23 get question 3 incorrect. Further, 20 students get both questions 1 and 2 incorrect, 15 get both questions 2 and 3 incorrect, and 8 get both questions 1 and 3 incorrect, and 7 get all three questions incorrect. Find the probability that a randomly selected student:
(a) Gets question 1 incorrect but gets question 2 correct.
(b) Gets questions 2 and 3 incorrect but gets question 1 correct.
(c) Gets all three questions correct.
There are two telephone lines A and B. Let E1 be the event that line A is being used and E2 be the event that line B is being used
Mean = 14.2, s² = 5.92 and sum of X squared EX² = 2941.60. What can be concluded about age differences in problem solving ability?
The ideal number of children. "What do you think is the ideal number of children for a family to have?" A Gallup Poll asked this question of 1016 arbitrarily chosen adults. Almost half (49%) thought two children was idea suppose that p = 0.49 is e..
Compute mean x and standard deviation s of data above. Calculate Ho by using traditional/classical method.
Determine the special property of standard normal distribution, compared to other normal distributions?
A loaf of bread is normally distributed with a mean of 22 oz and a standard deviation of 0.5 oz. What is the probability that a loaf is more than 22.25 oz?
How many subjects must be tested to determine the effectiveness of the product?
A customer from Cavallaro's Fruit Stand picks a sample of 5 oranges at random from a crate containing 80 oranges, of which 6 are rotten. What is the probability that the sample contains 1 or more rotten oranges? (Round your answer to three decimal..
Failure times for a randomly failing component are 3.3, 14.3, 27.1, 41.3, and 92.2 hours. Find the MTTF and standard deviation using: a) moment estimation. b) maximum likelihood estimation.
Find out the probability that: (a) The amount requested is between $65,000 or more?
Develop three regression models to predict the selling price based upon each of the other factors individually. Which of these is best?
At the .05 significance level, is the number of units produced on the afternoon shift larger?
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