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In order to be accepted into a JB University, applicants must score within the top 5% on the SAT exam. Given that the exam has a mean of 1000 and a standard deviation of 200, what is the lowest possible score a student needs to qualify for acceptance into the JB University?
The letters were rotated away from 0 degrees. Interestingly, reaction time decreased after 180 degrees. Can you explain why this might occur?
What was the probability that a student worked a part time job or made the Dean's list. Interpret the results.
A teacher gives a pre and post test to her students, she wants to know if there is a difference in the number of points students earned on their pretest and post test.
Assume we know the length of time a battery will hold a charge is a normal distribution with a mean of 50 hours and a standard deviation of 15 hours.
Nationwide, the average waiting time until electric utility customer service representative answers a call is 300 seconds per call. The Gigantic Kilowatt Energy Company took a sample of 35 calls and found that, on the average
We know that the population variance is 16. Estimate the mean number of admissions per 24-hour period with a 95% confidence interval.
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.
Gas Station pump signs, at one chain, encourage customers to have their oil checked, claiming that one out of every four cars should have its oil topped.
One more box is tested, and if that passes, all bulbs made that day will pass. Find probability that first box fails and second box passes.
If the contents in the population of all cans follow a normal distribution, what is the probability that the mean contents of a six-pack are less than 12 oz?
New population of pilots has normally distributed weights with mean of 128 lb and standard deviation of 31.7 lbs. If the pilot is randomly selected, determine the probability that his weight is between 120 lb and 181 lb.
For a candidate who guesses at all answers, find the mean and variance for the random variable X, the number of correct answers.
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