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Repeat given Exercise, but with observations in each sample.
Exercise Using the procedures in Computer Solutions 8.1 as a general guide, simulate 150 simple random samples of size n = 2 from an exponential distribution with a mean of 6. Determine the mean and the standard deviation of the 150 sample means, then compare these with their theoretically expected values. Given the nature of the population distribution, would we expect the distribution of sample means to be at least approximately normally distributed? Generate a histogram of the sample means and comment on the shape of the distribution.
Determine if it is possible for you and your friends to all earn an A in this course if the instructor "grades on a curve". Explain your answer. Discuss whether you think this method of grading is fair.
Graph the binomial distribution using a histogram and describe its shape. Identify any values of the random variable x that you would consider unusual.
List an example of Two quantitative variables that are likely to have a positive linear relationship, Two nominal variables that are likely to be independent.
Given that SAT test scores are normally distributed with 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 university?
in a region 80 of the population have brown eyes. if the 10 people are randomly selected find the probability that at
If the population standard deviation is known to be 7.5 hours, can we conclude at the 5% significance level that he is right?
The Statistical Abstract of the United States reports that the mean daily number of shares traded on the NYSE in 2002 was 1441 million.
in the following problem check that it is appropriate to use the normal approximation to the binomial. then use the
a producer of a cartain type of electronic component ships to suppliers in lots of twenty. suppose that 60 of all such
Norm Dickins the town pharmacist is interested in obtaining a loan to expand his business. He will get a better interest rate if he can reasonably demonstrate that his near-term monthly revenues will be between $10,000 and $15,000.
suppose the current price of gold is 930ounce. suppose also that the price 1 month from today has a normal distribution
What is the probability of getting a number less than 5 on both?
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