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A metropolitan school system consists of two districts-north and south. The north district contains 60% of all students, and the south district contains 40% of all students. A minimum competency test was given to all students. 10% of the north district students failed, and 15% of the south district students failed. What is the probability that a student from the entire school system, chosen at random, has passed?
a) 0.80
b) 0.85
c) 0.88
d) 0.90
In optimal solution, determinethe critical path?
Explain a Type I error for this situation. Explain a Type II error for this situation.
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Two types of flares are tested for their burning times (in minutes) and sample results are given below.
Give an example of a hypothesis test. State what the Null and the Alternative hypotheses.
An experiment consists of flipping the fair coin three times and noting the number of heads and tails. A random variable x is defined to be two times the number of heads plus the number of tails.
It has been claimed that women live longer than men; however, men tend to be older than their wives. Ages of sixteen husbands and wives from England were obtained. These data should be analyzed with a
What is the probability that more than one machine is in the system? Probability that more than two are broken and waiting to be repaired or being serviced? More than three? More than four?
Complete the ANOVA table. Carry out a test of hypothesis on each of regression coefficients. Could you delete any of the variables?
What is the probability the Time/CNN poll will provide a sample proportion within plus-or-minus 0.02 of the population proportion?
Carry out the suitable calculations to test for effect modification. Interpret your results.
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