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Comparison of 2 population proportions: A corporate raider based in Chicago has been successful in 11 of 31 takeover attempts. Another corporate raider based in NY has been successful in 19 of 50 takeover bids. Assuming that the success rate of each raider at each trial is independent of all other attempts, and that the information presented can be regarded as based on two independent random samples of the two raiders' overall performance, can you say whether one of the raiders is as successful as the other? Compute the test statistic.
what is the 25th percentile of a x2 distribution with 20 degrees of freedom? what symbol is used to denote this
If X=85 (sample mean), 8 is population standard deviation, and n=64 is sample size, construct a confidence interval estimate for the population mean.
after a pretty successful life financially you decide to give away your fortune to your five children. your fortune
The random variable x has a normal distribution with mean=30 and standard deviation=30, find the probability that x assumes a value more than two standard deviations from its mean. more than three standard deviations from the mean.
a sample of 55 night-school students ages is obtained in order to estimate the mean age of night-school students. x 25
Given the results in file XR14082, and using the 0.05 level of significance, examine whether the population median customer ratings for the three restaurants could be the same. Identify and interpret the p-value for the test.
Let X be a normal distributed random Variable with u=100 and o=10. the probability that X is between 70 and 100 is:
Based on data from Neilsen Media Research survey 44% of 5108 randomly selected households had their televisions sets tuned to the Superbowl on game day. Identify the sample, the population, and explain if the sample is likely to be representative ..
Explain the need for and the specific benefits (both tangible and intangible) of sharing digital forensics information among law enforcement communities. Make sure to give specific examples ; also do provide the justifications for your suggestions..
After a certain candidate announced his intention for running for the premiership of a province, many polls were conducted to assess his chanced for success.
What will be critical value of chi-square if test is to be performed at 0.025 level? At the 0.05 level?
What is the standard deviation for the sample proportion? What is the probablily that in this group over 18% of the new cars will be found to have electrical problems?
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