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According to the Bureau of the Census, 18.1% of the U.S. population lives in the Northeast, 21.9% in the Midwest, 36.7% in the South, and 23.3% in the West. In a random sample of 200 recent calls to a national 800-number hotline, 39 of the calls were from the Northeast, 55 from the Midwest, 60 from the South, and 46 from the West. At the 0.05 level, can we con- clude that the geographical distribution of hotline callers could be the same as the U.S. population distribution?
Source: Bureau of the Census, fact?nder.census.gov, July 30, 2009.
Suppose that 40% of participants consume caffeine and smoke. If 8 participants are evaluated, what is the probability that: Exactly half of them consume caffeine and smoke?
Satellite Office Systems has vacancies for two executives that it will fill from among four women and six men. What is the probability that exactly one woman is selected?
If two televisions are randomly selected, compute the probability that both televisions work. What is the probability at least one does not work?
A researcher was interested in the attitudes towards equal rights among stay at home moms and women with jobs outside the home. She creates a survey that measures attitudes toward equal rights, administers it to a sample of 20 women. Conduc..
What is the chi-square goodness-of-fit test? What are the differences/similarities between this test and an independent t-test? How do you know when to use one analysis over the other? Show an example.
What is the probability that their total annual costs for tutition, books and fees exceed $550,000?
Suppose x has a distribution with μ = 29 and σ = 22.(a) If a random sample of size n = 41 is drawn, find μ, σ and P(29 ≤ ≤ 31). (Round σ to two decimal places and the probability to four decimal places.)
If the mean (Mu) diastolic blood pressure in a certain age group is 80, and the standard deviation (Sigma) is 10, what is the probability that, in a sample of 100, the sample mean (X) is > 85?
the f.s. supplies company buys calculators from a japanese supplier. the probability of a defective calculator is 20.
Prove that the product of functions with the monotone likelihood ratio property also has the multivariate monotone likelihood ratio property.
Do a feasibility study to assess the likelihood of the project being completed and producing useful results. If possible, the feasibility study should contain some preliminary results (e.g. a pilot data set and initial data analysis).
1) What is the speed of the wave pulse? 2) What is the tension in the slinky? 3) What is the average speed of a piece of the slinky as a complete wave pulse passes?
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