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At Stats High, there is a difficult exam that every junior takes. Over the last 5 years, the exam results are normally distributed with a mean of 35% and a standard deviation of 7%. If your friend takes the exam and receives 58%, how would you explain to him how he did? What if he received 42%? Support your conclusion with probabilities and Z-scores.
Generate a vector x = (x1,..., x10,000) con- sisting of 10,000 random standard Normals. Let y = (y1,..., y10,000) where yi = exi . Draw a histogram of y and compare it to the pdf you found in part (a).
in pharmacologic research a variety of clinical chemistry measurements are routinely monitored closely for evidence of
Test Interviews Of two personnel evaluation techniques available, the first requires a two-hour test-interview while the second can be completed in less than an hour. The scores for each of the eight individuals who took both tests are given in t..
more than 50 million guests stayed at bed and breakfasts bampbs last year. the web sitenbsp for the bed and breakfast
To determine whether there exists mean difference among the groups:
A certain police officer stops cars for speeding. The number of red sports cars she stops in one hour is a Poisson process with rate 4, while the number of other cars she stops is a Poisson process with rate 1.
Let X be a continuous random variable with mean µ = 10 and variance σ2 = 100/3. Using Chebyshev's Inequality, find an upper bound for the probabilities.
answer each question with a minimum of 50 words per question1 describe a scenario where you believe a binomial
An internal study by the Technology Services department at Lahey Electronics revealed company employees receive an average of two emails per hour.
What contingency table test is used to see if there is a difference in the frequency distribution for two different groups?
To demonstrate the process is in control or out of control utilizing p-chart. A company which produces nails has retained you as a consultant.
Plot the market-share data. (b) Describe the trend (if any) and discuss possible causes. (c) Fit three trends (linear, exponential, quadratic).
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