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The ABC Corporation wants to test for a difference in two methods of training new employees. A sample of 15 new employees is given a three-day seminar (Method A) and a second sample of 12 new employees is given a two-day videocassette course (Method B). Each group is tested at the end of training and the results are: for Method A, the mean is 47.73 and the standard deviation is 4.42, foe Method B, the mean is 56.5 and the standard deviation is 4.27. At a 5% level of significance, can the company assume that there is No difference in the 2 methods of training? What is your conclusion?
Calculate the sensitivity and specificity of x-ray as a screening test for tuberculosis.
If "No sting operations are cases of entrapment" is false, what is the truth value of the following statements?
a cutting tool wears out with a time to failure that is normally distributed with a mean of 10 working days and a
Does the 95% confidence interval include the value 35? Explain.- Does the 99% confidence interval include the value 35? Explain.
A research firm claims that 62% of women in the 40-49 age group save in a 401(k) or individual retirement account. - Would the test be a z-test or a t-test? Why?
Six employees who have formed a car pool. If only four of these employees can drive, how many possible seating arrangements are there for the group?
The tuition at Moneypit U was $8700 in 2000. What is the predicted tuition in 2008?- Discuss the appropriateness of using the fitted equation to predict tuition for each of these universities.
Construct a 90% two-sided confidence interval onthe difference between the proportion nonconforming in processes 1 and 2. Based on this confidence interval, can you conclude at a significance level of 10% that the difference is not equal to 10%? W..
A public broadcasting station plans to launch a special appeal for additional contributions from current members. Unsure of the most effective way to contact.
questionthe table below provides summary information about students in a class. the sex of each individual and the
hypothesis test for two factors anova.nbspnbspnbspnbspnbspnbsp a mail order catalogue company operates with three
(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)}.
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