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A close friend of mine became very ill and couldn't work for several months. Naturally, this put a big strain on his family financially. I decided to start a GoFundMe page to help with his medical costs. After some research, I found that donations for a GoFundMe for this type of situation are normally distributed with a mean of $100 and a standard deviation of $60. I was able to reach almost 5,000 people, and actually received contributions from 2,550 of them. Let S be the aggregate donations given by the 2,550 individuals.
a. What is the mean, variance, and standard deviation of the aggregate donation, S?
b. What is the probability that the aggregate donation, S, exceeds $260,000?
Consider the following Activity-On-Node (AON) PERT project. The three values that represent each activity's completion time (in days).
What is the interval that is 95% certain to contain the actual proportion of people in this age group who have seen a ghost?
What percentage of applicants scored below 750
Identify and explain in some detail the causes for congressional gridlock and any solutions you come across in doing your research.
the life expectancy of computer terminals is normally distributed with a mean of 4 years and a standard deviation of 10
Provide an appropriate response. The frequency distribution for the weekly incomes of students with part-time jobs is given below. Construct the corresponding relative frequency distribution.
Assert with probability of at least 0.95 that the error of her estimate will not exceed 0.07. How large a sample, n, will she require if she has no idea what the true proportion is.
The prices of several bonds with face values of $1,000 are summarized in the following table:
Write a careful description comparing the three bootstrap distributions and also comparing them with the exact sampling distribution. What are the effects of increasing the sample size?
Target population: US college students Sample population: College students at one particular regional university.
Determine the type of distribution and then answer the questions.
Do the data appear to require transformation before using a single-factor ANOVA to compare the four treatments?
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