Mathematics, 07.04.2020 20:18 arri05
A study of road rage asked separate random samples of 596 men and 523 women about their behavior while driving. Based on their answers, each respondent was assigned a road rage score on a scale of 0 to 20. Are the conditions for performing a two-sample ttest satisfied?
A. Maybe; we have independent random samples, but we need to look at the data to check Normality.
B. No; road rage scores in a range between 0 and 20 can’t be Normal
C. No; we don’t know the population standard deviationsd.
D. Yes; the large sample sizes guarantee that the corresponding population distributions will be Normale.
E. Yes; we have two independent random samples and large sample sizes
Answers: 3
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Mathematics, 21.06.2019 17:20
Four airplanes carrying a total of 400 passengersarrive at the detroit airport. the airplanes carry, respectively,50, 80, 110, and 160 passengers.a) one of the 400 passengers is selected uniformly at random.let x denote the number of passengers that were on theairplane carrying the randomly selected passenger. find var(x)for x as given in the problemb) one of the 4 airplane drivers is also selected uniformly atrandom. let y denote the number of passengers on the chosen driver’s airplane. find var(y) for y as given in the problem
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Describing the rules ot signea numbers quick check complete these sentences to describe the rules of dividing signed numbers.
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A study of road rage asked separate random samples of 596 men and 523 women about their behavior whi...
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