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Construct a 90% confidence interval for the difference between the two population proportions.
The CEO of the company would like to find out if Canadians like his company on January 1, 2001. Of the 1002 Canadians surveyed, 551 said yes. When the same question was asked on July 1, 2002, 541 of the 1002 Canadians surveyed said yes.
a. Test whether the proportion of Canadians who like his company has changed since January 1, 2001 at a 0.05 significance level.
b. Construct a 90% confidence interval for the difference between the two population proportions.
MATH1550H: Assignment: Question: A word is selected at random from the following poem of Persian poet and mathematician Omar Khayyam (1048-1131), translated by English poet Edward Fitzgerald (1808-1883). Find the expected value of the length of th..
For each problem, compute a Welch F-statistic and determine whether or not significant differences exist among the treatment conditions.
Finding the value of test statistic utilizing two-tail 't' test also interpret the result. The Commercial Bank as well as Trust Company is studying the use of its automatic teller machines.
A simple random sample of 1000 Americans found that 61% were satisfied with the service provided by the dealer from which they bought their car.
Find the value of the standard normal random variable z, called z 0 such that:
Determine the probability that no female are hired. Determine the mean and standard deviation of X.
A newspaper reports have 58 percent of farmers are planning to plant genetically modified crops presesnt year. The article adds that the poll is based on a random sample.
What are the expected value and variance of the following probability distribution?
Drug sniffing dogs must be 95% accurate. A new dog is being tested and is right in 46 of 50 trials. Find a 95% confidence interval for the proportion of times the dog will be correct.
How large random sample of potential voters will be required to evaluate result with 95% confidence and with margin of error of plus and minus 3%?
Carry out F test for significance of straight line regression of Y on X and interpret your results.
What is the expected number of customers that will have to wait more than 6 hours?
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