Mathematics, 17.07.2019 04:20 liliana74
Customers arrive at a movie theater at the advertised movie time only to find that they have to sit through several previews and prepreview ads before the movie starts. many complain that the time devoted to previews is too long (the wall street journal, october 12, 2012). a preliminary sample conducted by the wall street journal showed that the standard deviation of the amount of time devoted to previews was four minutes. use that as a planning value for the standard deviation in answering the following questions. round your answer to next whole number. a. if we want to estimate the population mean time for previews at movie theaters with a margin of error of 75 seconds, what sample size should be used? assume 95% confidence.
Answers: 2
Mathematics, 21.06.2019 14:00
The product of two negative rational numbers is always zero sometimes zero never zero
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Mathematics, 21.06.2019 15:20
Which is the equation of an ellipse with directrices at x = ±4 and foci at (2, 0) and (−2, 0)?
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Mathematics, 21.06.2019 21:30
Plz hurry evaluate the expression a+b where a=8 and b=19
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Customers arrive at a movie theater at the advertised movie time only to find that they have to sit...
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