When referring to the normal probability distribution
tutor4helpyou1) When referring to the normal probability distribution, there is not just one; there is a "family" of distributions.
True or 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 deviation 
3) 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 15 
 a mean of 1 and a standard deviation of 1 
 a mean of 0 and a standard deviation of 1 
 a mean of 0 and a standard deviation of 15 
4) 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:
 1.00 
 0.333 minutes 
 0.5 
 10 minutes 
6) If an average of 12 customers are served per hour, then one customer arrives every. Choose one.
 5 minutes 
 10 minutes 
 60 minutes 
 12 minutes 
7) In a uniform probability distribution, P(x) is constant between the distribution's minimum and maximum values.
True or False 



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 shaped 
10) 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 minutes 
11) For the exponential distribution, the mean and standard deviation are equal.
True or 

False 

12) Some normal probability distributions have equal arithmetic means, but their standard deviations may be different.
True or 
False 
13) 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  âˆž and + âˆž. 
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 
 Zscore

16) A binomial distribution has 50 trials (n = 50) with a probability of success of 0.50 (Ï€=0.50). To use the normal distribution to approximate the binomial, what are the mean and standard deviation? Choose one?
 Âµ =25 and Ïƒ = 4.33 
 Âµ =25 and Ïƒ = 12.5 
 Âµ = 25 and Ïƒ = 3.5355 
 Âµ =50 and Ïƒ = 100 
17) In an illustration of a normal probability distribution, a shaded area represents. Choose one:
 a probability 
 a combination 
 a standard deviation 
 a permutation 
18) 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 different 
19) The area under the normal curve within plus and minus one standard deviation of the mean is about 68.26%.
True or 
False 
20) The standard deviation of any uniform probability distribution is. Choose one of the following:
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Statistics Homework  Multiple choice Questions
NOT RATED1) When referring to the normal probability distribution, there is not just one; there is a "family" of distributions.
True
or
False
2) The standard normal probability distribution is unique â€¦7 years ago