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1
A random variable, time to load a delivery truck, is uniformly distributed. The distribution is defined by the
A)minimum and maximum times to load a delivery truck.
B)maximum time to load a delivery truck.
C)minimum time to load a delivery truck.
D)standard deviation.
2
A uniform distribution's shape is
A)Bell shaped.
B)Positively skewed.
C)Negatively skewed.
D)Rectangular.
3
The normal distribution is a _____ distribution.
A)Discrete
B)Continuous
C)Positively skewed
D)Rectangular
4
A normal distribution can be characterized as a/an_____distribution.
A)bell-shaped
B)symmetric
C)asymptotic
D)All of the above.
5
For a normally distributed random variable, the
A)random variable cannot assume negative numbers.
B)distribution is defined by the mean and standard deviation of the random variable.
C)variance of the random variable must be greater than one.
D)probability that the random variable is greater than the mean is 0.60.
6
Which of the following statements is correct regarding the standard normal distribution?
A)It is also called the z distribution
B)Any normal distribution can be converted to the standard normal distribution
C)The mean is 0 and the standard deviation is 1.
D)All of the above are correct.
7
The area under a normal curve between 0 and -1.75 is
A).0401
B).9599
C).4599
D)1.4599
8
The area under a normal curve less than 1.75 is
A).0401
B).9599
C).4599
D)1.4599
9
The continuity correction factor is used when
A)The sample size is at least 5.
B)Both nπ and n (1 - π) are at least 30.
C)A continuous distribution is used to approximate a discrete distribution.
D)The standard normal distribution is applied.
10
The normal approximation to the binomial is used when
A)The sample size is at least 30.
B)Both np and n (1 -π) are at least 5.
C)The mean and the variance are the same.
D)The z value is greater than 0.
11
In the standard normal distribution, what is the probability of finding a z value between -1.25 and -1.00?
A)0.3944
B)0.3413
C)0.7357
D)0.0531





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