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Suppose the mean test scores for a college enter exam is normally distributed with mean = 78 and standard deviation = 12.
a). If an individual student is selected at random, what is the probability that this student's score is over 80?
b). A classroom of 16 of these students is used as a sample. What is the probability that the class mean is greater than 80?
The probability that Ms. Brown will sell a piece of property at a profit of $3,000 is 3/20 , the probability that she will sell it at a profit of $1,500 is 7/20 , the probability that she will break even is 7/20 , and the probability that she will..
What assumptions must you make in order to use these statistics for inference? Explain in context what this confidence interval means.
a researcher with ministry of transportation is commissioned to study the drive times to work one-way for u.s. cities.
The University of Ghana in Legon, Ghana, was established in 1948 as an affiliate college of the University of London called University College of the Gold Coast. In 1961 the university was reorganized by an act of Parliament into what it is today:..
For the same kind of lottery as in Exercise 3, which of the following strategies can improve your chance of winning? If the method works, explain why. If not, explain why using appropriate statistics terms.
A quadratic revenue function often occurs in practice. The reason is that as more units are produced, the price must be lowered in order to sell them all.
Box A contains three balls with colors red, green and blue and box B contains a balls with colors red, yellow ,blue, white and brown A box is chosen and a ball is picked. What is the probability that the ball may be brown is? What is the probability ..
If the distribution of mouth volumes is nearly Normal, what percentage of men and of women should have even larger mouths than these (higher than the highest listed above)?
during a gas leak it is known that there is a 25 risk of developing breathing problems. in the midst of a recent gas
How many state variables are to be considered if an LP problem with n variables and m constraints is to be solved as a dynamic programming problem?
A large construction firm estimates that 25% of the jobs that it manages are not completed within the contracted time period. It looks at a random sample of 8 jobs that it has managed. a. What is the probability that less than 3 of the jobs were ..
There were a large number of foreclosures of family homes. In one large community, realtors randomly sampled 36 bids from potential buyers to determine the average loss in home value. The sample showed the average loss was $11,560 with a standard ..
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