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A researcher would like to compare the political attitudes for college freshmen with those for college seniors to see if they are different. Samples of n1 = 10 freshmen and n2 = 10 seniors are obtained, and each student is given a questionnaire measuring political attitude on a scale from 0 (very conservative) to 100 (very liberal). The average score for the freshmen is 1 = 52 with a variance of s12 = 480, and the seniors average 2 = 39 with a variance of s22 = 420.
Conduct a t-Test (two-tail, α = .05) for two Independent groups to see if there is a significant difference between the two groups (follow the Handout).
Fizz fizz soda comes in two varieties, regular and diet. If a researcher has 8 boxes of each, how many ways can he select 2 boxes of each for a quality control test? Which answer would be correct?
(a) Obtain the moment-generating function of the random variable N{t + S). Indication. If X has a Poisson distribution with parameter a, then Mx(t) = exp{α(et - 1)}.
calculate a 99 confidence interval for the true mean of a bearings diameter when a sample of 16 of the bearings have a
assume x is a standard normal random variable and y n09so variance is 9. what is the 97.5 percentile of px and
What is the probability that a randomly selected customer gets a shave or a haircut?- What is the probability that a randomly selected customer gets neither?
1. Let P be a regular transition matrix and let w be the unique non-zero fixed vector of P. Show that no entry of w is 0.
Suppose a card has just been inserted and the light is green - What is the probability that the door will actually open
For each of the following situations, state which type of sampling plan was used. Explain whether you think the sampling plan would result in a biased sample.
In project management, the WBS helps with the calculation of the cost, time and work effort as well as the gathering of requirements from the customer.
Later for a class project you decide to use this data to find out information about your class. This is an example of using ________.
Let the random variable X be the maximum distance (in meters) from release at which the dye is detected after one day. Is X discrete or continuous
A study of 40 bowlers showed that there average score was 186 the standard deviation of the population is 6. Find the 95% confidence interval of the mean score for all bowlers.
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