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1. Suppose that scores on a national exam are normally distributed with mean µ = 500 and standard deviation U 100. Ninety percent of test takers will score less than what score on the exam?
2. A local deli chain makes a signature sandwich. Suppose that the amount of fat grams in the signature sandwich is a normally distributed random variable with mean µ = 16 grams and standard deviation σ =1.5 grams. Find an amount of fat grams such that 50 percent of the sandwiches have no more than that many fat grams.
A company was developing a new vitamin for those at risk from ailments associated with low calcium levels. In order to test the effectiveness of three new formulations a group of test subjects had their calcium levels tested before and after takin..
What is the real world value of the y-intercept and slope in a regression equation? Other than statistics problems, why should I care?
What is the probability that there are less than 500 nails in a randomly selected five pound box of nails?
Describe the variable of interest.- Write a probability question and a statistic question involving this population and sample.
Determine the mean and standard deviation of following probability distribution.
Find an n×1 vector U of normal random variables with mean 0 and cov(U) = G. Hint: let V be an n×1 vector of independent N(0, 1) variables, and let U = G1/2V.
What type of hypothesis test is needed? What distribution should be used? Why?
Identify the class width - identify the midpoint of the first class and identify the class boundaries of the first class.
the average length of a new born baby is 20 inches with a standard deviation of 1 inch.b. if n100 what is the mean of
create a dataset of at least 50 observations from your workplace or personal experiences. calculate the descriptive
Describe and explain the three commonly used methods for calculating market VaR. Give the advantages and disadvantages.
The following data are daily price quotations of two stocks:
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