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##### Statstics Multiple choice

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Question;1);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 -? 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? = 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;-;(b - a)/2;-;-;n(1 -?);-

Paper#62278 | Written in 18-Jul-2015

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