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Question: Some research projects are developed using the case study approach. Using this approach, we choose a single observation for detailed study, but we still want to generalize the results of our survey to wider populations. For example, we might choose to study one inner city neighborhood, rather than the inner city as a whole, but we are interested in making conclusions relevant across the city or even to other cities. When do you think case studies are potentially more valuable than surveys? What can be done to generalize the results of the study?
assume that we have two events a and b that are mutually exclusive. assume further that we know pa .30 and pb .40.a.
Chrysler Corporation agrees to allow you to randomly select 40 of its new Dodge Caravans to test the highway mileage. Chrysler claims that the caravans get 28mpg on the highway.
Suppose that a group of 48 students who took the SAT was chosen. If you wanted to calculate a probability for the average SAT score for these 48 students, what is the standard error.
A certain health spa claims its clients have BMI between 23.5 and 24. Suppose eight health spa clients are selected at random. What is the probability that the sample mean will be in this interval?
consider the function fxx3-2x4 on the interval -22 with h0.25. use the forward backward and centered finite difference
A continuous random variable X has a normal distribution with mean 12.25. The probability that X takes a value less than 13 is 0.82.
An ordinary deck of cards contains 52 cards divided into four suits. The red suits are diamonds and hearts and the black suits are clubs (?) and spades (?).
What is the relationship between descriptive statistics and Affirmative Action ? Can using probability in market trending decisions lead to a bad decision? Explain?
A real estate agent wants to compare the variation in the selling price of homes on the oceanfront with those 3 blocks away A sample of 21 oceanfront homes sold within the last year revealed the standard deviation of the selling prices was 45,600.
How would you explain the analysis of variance, assuming that your audience has not had a statistics class before?
HIV testing. In July 2005 the journal Annals of Internal Medicine published a report on the reliability of HIV testing.
Speed of light. In 1882 Michelson measured the speed of light (usually denoted c as in Einstein s famous equation E = mc2). His values are in km/sec.
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