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Statistics Homework - Multiple choice Questions

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Question;1) When referring to the normal probability distribution, there is not just one, there is a "family" of distributions.Trueor False 2) The standard normal probability distribution is unique because it has:Choose one:Any mean and a standard deviation of 1-A mean of 0 and any standard deviation-A mean of 0 and a standard deviation of 1-A mean of 1 and any standard deviation3) Tables of normal distribution probabilities are found in many statistics books. These probabilities are calculated from a normal distribution with. Choose one:a mean of 100 and a standard deviation of 15a mean of 1 and a standard deviation of 1a mean of 0 and a standard deviation of 1a mean of 0 and a standard deviation of 154) What is the percentage of the total area under the normal curve within plus and minus two standard deviations of the mean? Choose one:34.13%68.26%99.74%95.44%5) The time to fly between New York City and Chicago is uniformly distributed with a minimum of 120 minutes and a maximum of 150 minutes. What is the probability that a flight is between 125 and 140 minutes? Choose one:1.000.333 minutes0.510 minutes6) If an average of 12 customers are served per hour, then one customer arrives every. Choose one.5 minutes10 minutes60 minutes12 minutes7) In a uniform probability distribution, P(x) is constant between the distribution's minimum and maximum values.TrueorFalse 8) The total area of a normal probability distribution is. Choose one:-approximated by the binomial distribution.-1.00.-dependent on a value of 'z'.-between -3.0 and 3.0.;9) The shape of any uniform probability distribution is. Choose one:-Positively skewed-Rectangular-Negatively skewed-Bell shaped10) The time to fly between New York City and Chicago is uniformly distributed with a minimum of 120 minutes and a maximum of 150 minutes. What is the mean? Choose one:-150 minutes-120 minutes-270 minutes-135 minutes11) For the exponential distribution, the mean and standard deviation are equal.Trueor False 12) Some normal probability distributions have equal arithmetic means, but their standard deviations may be different.TrueorFalse13) A random variable from an experiment where outcomes are normally distributed. Choose one:-can have a mean of 0 and a standard deviation of 1.-can have only a few discrete values.-can have no values.-can have any value between -? and +?.14) If an average of 60 customers are served per hour, then one customer arrives every. Choose one:-1 minute-12 minutes-60 minutes-10 minutes;15) What is a normal distribution with a mean of 0 and a standard deviation of 1 called? Choose one:-Binomial probability distribution-Standard normal distribution-Frequency distribution-Z-score;16) A binomial distribution has 50 trials (n = 50) with a probability of success of 0.50 (?=0.50). To use the normal distribution to approximate the binomial, what are the mean and standard deviation? Choose one?? =25 and? = 4.33? =25 and? = 12.5? = 25 and? = 3.5355? =50 and? = 10017) In an illustration of a normal probability distribution, a shaded area represents. Choose one:-a probability-a combination-a standard deviation-a permutation18) Two normal distributions are compared. One has a mean of 10 and a standard deviation of 10. The second normal distribution has a mean of 10 and a standard deviation of 2. Which of the following is true?-The distributions are from two different families of distributions-The dispersions of the distributions are different-The dispersions of the distributions are the same-The locations of the distributions are different19) The area under the normal curve within plus and minus one standard deviation of the mean is about 68.26%.TrueorFalse20) The standard deviation of any uniform probability distribution is. Choose one of the following

 

Paper#62314 | Written in 18-Jul-2015

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