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How easy is it to get into contact with a person in Sacramento, California? If you don't know the telephone number, it could be difficult. The date from Survey Sampling of Fairfield Connecticut reported in American Demographics, show that 68% of the telephone-owning households in Sacramento have unlisted numbers. For a random sample of 150 Sacramento households with telephone, what is the probability that
a. 100 or more have unlisted numbers?
b. Fewer than 100 have unlisted numbers?
c. Between 50 and 65 (including 50 and 66) households have listed numbers?
suppose that there are a total of 16 students in an elementary school class. the teacher assigns each of the students a
An oil co. is drilling some wells. the results are described as either a dry well or a producer well. Past experience suggests that 10% of exploratory wells are producer wells.
Calculate the Measures of Center and Measures of Variation for the following data set representing the chest size of 20 bears in inches.
For the mold described in (g), can you find the probability that it's COST value will exceed $150,000? If yes, obtain this probability. If no, why not?
suppose x y and c represent the length width and perimeter of a flat rectangular sheet metal part. note that x is a
1.a study was conducted to explore the relation between alcohol consumption and hypertension. 7400 nurses were surveyed
after a military campaign a random sample of 59 soldiers none of whom know each other was examined and the number of
you play two games against an opponent. the probability you win the first game is 0.7. if you win the first game the
While it can't be denied that advertising impacts sales, it is also true that advertising is expensive and companies want to advertise in ways that have the greatest benefit for the amount of money spent.
questionthe following artificial data record the length of stay in days spent on a psychiatric ward for 28
Multiple choices based on regression analysis - the percentage of variation in the dependent variable explained by the variation in the independent variable
Assume that each of the following studies cannot be analyzed using a parametric procedure. For each of the following studies (below), indicate the appropriate nonparametric procedure, and explain why you chose it.
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