Mathematics, 28.11.2019 01:31 ginocousins06
From several years worth of experience, workers at a particular ford company assembly plant in cleveland have determined that it takes, on average, 7 minutes to complete a particular task. they are not sure, however, of the variance. their supervisor, however, believes that the standard deviation is 30 seconds. suppose that the workers take a random sample of 16 cars and calculate the sample standard deviation, s, to be 25.65 seconds and want to test the following hypothesis: h0: f2 = 900h1: f2 is not? 900use the following information to perform the appropriate test using a 5% significance level. relevant information: we showed in class that an unbiased estimator for the population variance, f2 is the sample variance, s2. it turns out that the expression: [(n-1)s2/ f2] follows a chi-squared distribution (p2) with n - 1 degrees of freedom. at the 5% level of significance, and for 15 degrees of freedom, the upper and lower p2 critical valuesare: 6.262 and 27.488.
Answers: 1
Mathematics, 21.06.2019 16:40
Question 10jur's car can travel 340 miles on 12 gallons. jack's car can travel 390 miles on16 gallons. which person has the best mileage (miles per gallon) and what istheir mileage?
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Two friends are reading books. jimmy reads a book with 21,356 words. his friend bob reads a book with one-and-a-half times as many words. which expression represents the number of words bob reads?
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A, at (-2, 4), is 6 .of a'? (-8, 4) (-8, -2) (-2, -2) (-2, 4) b, at (-4, -7), isy-.of b'? (-4, 7) (4, -7) (4, 7) (-4, -7)
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From several years worth of experience, workers at a particular ford company assembly plant in cleve...
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