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Ableson's anthropology professor announced that the poorest exam grade for each student would be dropped. Ableson scored 79 on the first anthropology exam. The mean was 67 and the standard deviation 4. On the second exam, he made 125.
The class mean was 105 and the standard deviation 15. On the third exam, the mean was 45 and the standard deviation 3. Ableson got 51. Which test should be dropped?
a horse race has 12 entries and one person owns 3 of those horses. assuming that there are no ties what is the
The distribution of sample means? Compute the z-score for M=89 for a sample of n=25 scores. Is this sample mean in the middle 95% of the distribution?
Let X be a Gaussian (µX, CX) random vector. Let Y = AX where A is an m ×n matrix of rank m. By Theorem 5.16, Y is a Gaussian random vector. Is a Gaussian random vector?
past experience shows that over time the rivets in bridge supports can become dangerously loose. assume that x the
The unlikelihood of everyone who plays the lottery choosing a correct 6 would be very large indeed. Is this unethical advertising? Is it misleading? is the lottery in general, unethical? Why or why not?
Discuss a recent research project undertaken in the last 3 to 5 years. What type of analysis was conducted? What decisions were made?
Suppose that, from a population of 75 bank accounts, we want to take a random sample of six accounts in order to learn about the population. How many different random samples of six accounts are possible?
a banks loan officer rates applicants for credit. the ratings are normally distributed with a mean of 200 and a
high-potassium foods potassium is important to good health in keeping fluids and minerals balanced and blood pressure
Your poster should highlight the problem and its motivation, your approach and principal contributions, the results of your experiments, and any major take-aways for the future - development of your statistical analysis, including a mathematical f..
For satisfaction with the purchase of sunglasses, the estimate of beta, the slope of S with respect to M,was b = 2.20. The reported t statistic was 2.53. The sample size was n = 54.7 Is this regression statistically significant? Explain the findin..
using the flag data set given below fit a model that predicts cost based on dotest. use the complete data set in your
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