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The central university has a student population of 60000. The university is interested in determining what proportion of them is in favour of a new grading system.
Determine a sample size with confidence level of 95% that will show the true proportion of population in favour of the new system within plus and minus 0.02.
In each of the following cases, decide whether or not a binomial distribution is an appropriate model, and give your reasons.
A business owner decides to use a binomial distribution to solve one of his problems.
A skeptical paranormal researcher claims that the proportion of Americans that have seen a UFO is less than 1 in every one thousand. State the null hypothesis and the alternative hypothesis for a test of significance.
What is the probability that a cereal would either high calorie or high fiber? In other words, what is P(high calorie or high fiber)?
A firm keeps account for 28 customers. 12 of these are defined as new customers and 14 are locally based. If just 3 new customers live locally, how many established customers do not live locally?
Determine the coefficient of determination. Assuming a direct relationship between the variables, what is the coefficient of correlation?
For the data giben below, prepare a R-chart. Note that the sample size is three.
Random Sample: Before you begin your analysis you are required to take a random sample of size 110 from the 170 cases in the file. Use the file Random_Sample_Generator-13-2.xls to do this.
What is the purpose of a post-hoc test with analysis of variance? What is probabilistic equivalence? Why is it important?
Only two doctors would make a diagnosis on patients coming into the same STD clinic for gonorrhea. The probability of the two doctors making a diagnosis of gonorrhea is (independent, dependent, synergistic, cannot tell).
A foreman for a firm admits that on 10% of his shifts he forgets to shut off the machine. This causes the machine to overheat and the probability that a defective mold will be produced during the early morning run increases from 2% to 20%.
Surveys have been widely used by politicians around the world as a way of monitoring the opinions of the electorate. Six months ago, a survey was undertaken to determine the degree of support for national party leader.
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