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In random samples, 46 of 400 tulip bulbs from one nursery failed to bloom and 18 of 200 tulip bulbs from another nursery failed to bloom. Use the χ2 statistic to test the null hypothesis θ1 = θ2 against the alternative hypothesis θ1 θ2 at the 0.05 level of significance
18 people were poled and 10 said they have shopped at Wal-Mart and 8 said they have shopped at Target. 4 said they shopped at both. What is the probability that the group shopped at Wal-Mart or Target? Define independent and mutually exclusive even..
The average age of the evening students is significantly different from 21. Use a 0.01 level of significance."Compute the test statistic for the test stated in the problem"
Refer to the Journal of Information Science study of the relationship between the fraction y of documents retrieved using Medline and the number x of terms in the search query, Exercise 9.39. (p. 502)
A researcher hypothesizes that the variation in the amount of money spent on business dinners is greater than the variation of the amount of money spent on lunches. The variance of nine business dinners was $6.12 and the variance of 12 business l..
Is it possible to normalize the data when the population shape has a known skew? How would you demonstrate the central limit theorem to your classmates?
What happens to the confidence interval and the power of the test at a particular point of interest
a student takes a calculus midterm and a history midterm. the mean and standard deviation on the calculus midterm are
Lagrangian Relaxation in Multidimensional Assignment) Apply the Lagrangian relaxation method to the multidimensional assignment problem of Example 10.7, in a way that requires the solution of 2-dimensional assignment problems. Derive the form of ..
a random sample of n 36 measurements is selected from a population with mean equal to 5 and standard deviation 3. what
a certain brand of fluorescent light tube was advertised as having an effective life span before burning out of 4000
in a jury there are 12 selected jurors. we are looking to see how many prospective people should go to jury duty.
Find the point estimate p-hat and the margin of error for the confidence interval (0.444, 0.484)
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