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A metropolitan school system consists of three school districts-norths, south, central. The north district contains 25% of all students, the south district contains 40%, and the central district contains 35%. A minimum-competency test was given to all students; 10% of the north district students failed, 15% of the south district students failed, and 5% of the central district students failed.
a) Develop a probability tree showing all marginal, conditional, and joint probabilities.
b) Develop a joint probability table.
c) What is the probability that a student selected at random failed the test?
Find out the suitable critical value(s) for this situation given a 0.05 significance level. Find out/compute the value of sample test statistic.
Illustrate what decision should be made depended on the mini-max regret criterion. Decision based on the Mini-max criterion.
For a sample with standard deviation of 10, a score of X = 44 corresponds to z-score of 0.50. Based on this info, determine the sample mean?
Now suppose that a finished product is randomly selected. What is the probability that it is defective?
Determine the mean number of times the machine was used per day.
Imagine that these results are disseminated to the general public through publication and media coverage. Write about one possible harmful consequence that these conclusions could have in the "everyday" world.
Use differential calculus to find both sales volume at which revenue is maximised and the maximum revenue available from sales of product X.
How do I construct an example where I would be able to apply the concept of expected value to a problem (e.g. a financial investment problem would be a great way to demonstrate how various stocks in a portfolio produce a weighted average of the ov..
A least squares linear trend line is just a simple regression line with the independent variable being time (months or years for example).
Finding the probability of sample and describe the sampling distribution of the sample means.
The state wanted to see how three different math classes compared, so they gave a standardized test to all the students. Given the following results
While dealing with 16 students, suppose that the alternative hypothesis has been one-sided and that it was set as Ha :
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