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The GRE combined scores for students applying to an engineering school's Graduate Program are normally distributed with a mean of 1500 and a standard deviation of 100.
(a) An applicant needs a minimum combined score of 1400 to gain admission.
(b) What percentage of applicants have combined GRE scores between 1200 and
(c) The Dean of Engineering wants to change the minimum combined GRE score What percentage of applicants meet or exceed the minimum qualification ? Needed to gain admission, so that only 33% of applicants are eligible. What should the new minimum score be?
In a group of six professors selected at random, what is the expected number of extroverts? What is the standard deviation of the distribution?
Estimate the probability that the next time you ride in a car, you will not be delayed because of some car crash blocking the road.
Findout either the given correlation is significant at given level of significance. Illustrate what does sample size have to do with the significance of r.
A sample of 64 observations is selected from a normal polulation with a population standard deviation of 15. The sample mean is 215. Ho: U>= 220 and H1: U
Probability using Z-score.Find the probabilities that a random variable Z having a standard normal distribution will take on a value.
Is there a statistically significant difference between the bowling averages of male nurses and those of businessmen, if last year's league play produced the following data
A population is Normally distributed and has a σ = 24. Samples of size 25 have a sample mean of 100. Find the 90% confidence interval for the population mean.
Find the probability that in a given month a) there are exactly 9 days with 0.01 inch or more precipitation, b) there are at most 9 days.
A company has developed the new battery, but the average lifetime is unknown. In order to estimate the average, a sample of 150 batteries is tested and an average lifetime of this sample is found to be 250 hours.
At the .05 significance level can we conclude that there is more variation in the processing time of the new machine?
The researcher also gathers data on age and major to see if there is any connection between these varibales and frequency of sexual harassment.
What are some conditions under which business decisions are made using subjective probability concepts? Could you please cite two examples of subjective probability.
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