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The probability of the complement of an event W is ________.


A) the probability of all of the outcomes that are not in that event W
B) twice the probability of the original event W
C) usually the same as the probability of event W
D) the square of the probability of the event W

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It has been reported that,on average,families in Colorado Springs eat fast food 2.2 times per week with a standard deviation of 1.1 times per week.Assume that the distribution of the number of times that families eat fast food is a normal distribution.What is the likelihood that a family eats fast food one to three times each week?

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μ = 2.2,σ = 1.1.Using Excel "=...

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Standardized z values can be used to find a probability using ________.


A) a discrete continuous table of values
B) the standard normal table
C) the t-table
D) the formula P(X) = Standardized z values can be used to find a probability using ________. A) a discrete continuous table of values B) the standard normal table C) the t-table D) the formula P(X) =

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A cumulative distribution function,F(x),specifies the probability that the random variable X will assume a value greater than or equal to a specified value,x.

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Which of the following is true of random variables?


A) Random variables may not have a physical or natural meaning.
B) Random variables are used with data that is numerical.
C) Each element in a sample space is represented by a random variable.
D) The probability of the occurrence of an event is represented by a random variable.

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In an experiment,a random variable is ________.


A) a value picked from a set of values that all have an equal chance of occurring
B) a variable chosen at random from a distribution list
C) an outcome that has zero chances of occurring
D) a numerical description of the outcome of an experiment

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Subjective probability ________.


A) can have all probabilities deduced from theoretical arguments because the process that generates the outcomes is known
B) is based on personal judgment
C) is the same as conditional probability
D) is based on experimental data

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Two events are mutually exclusive as long as ________.


A) they can occur simultaneously
B) they have two outcomes in common
C) they have no outcomes in common
D) between them,they account for every event in the sample space

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For probability purposes,an experiment is ________.


A) a process that results in some outcome
B) the collection of all possible outcomes
C) a theoretical result
D) the absolute values of all outcomes

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What is the probability of choosing a day of the week that begins with T (Tuesday or Thursday) ?


A) What is the probability of choosing a day of the week that begins with T (Tuesday or Thursday) ? A) B) C) D)
B) What is the probability of choosing a day of the week that begins with T (Tuesday or Thursday) ? A) B) C) D)
C) What is the probability of choosing a day of the week that begins with T (Tuesday or Thursday) ? A) B) C) D)
D) What is the probability of choosing a day of the week that begins with T (Tuesday or Thursday) ? A) B) C) D)

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Probability is ________.


A) the observed result of an experiment
B) the chance that an event will not happen
C) the likelihood that an outcome occurs
D) the number of successes divided by the number of failures

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Which of the following is not true for a normal distribution?


A) The curve for a normal distribution is symmetric.
B) One-third of the total area falls above the mean.
C) The tails of the distribution extend to negative and positive infinity.
D) 99% of the area lies within 3 standard deviations of the mean.

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Which of the following is true of classical probability?


A) It is based on theoretical arguments.
B) It is determined by historical data and past outcomes.
C) It is based on experimental data.
D) It is based on personal judgment.

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Compare and contrast a probability mass function and a probability density function.

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A probability mass function represents a...

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At a particular toll booth,20% of vehicles use transponders while the rest have their license plates scanned.Usually,150 vehicles pass this toll booth during any one hour time period.During the next hour,what is the probability that more than 40 vehicles will pass through using a transponder?


A) 3.23%
B) 6.17%
C) 1.85%
D) 96.77%

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The standard normal probability distribution uses the z-statistic.

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The expected value of a random variable corresponds to the notion of the ________ of a sample.


A) median
B) mode
C) mean
D) range

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How might a Poisson probability distribution be used in business processes?

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Since a Poisson distribution is used to ...

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It was reported that the mean high temperature in the continental United States on October 5,2011 was 75.77°F,with a standard deviation of 10.95°F.If temperature in the U.S.follows a normal distribution,what is the probability that a city chosen at random reported a temperature higher than 90°F?

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μ = 75.55,σ = 10.95,and x = 90.Using Exc...

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The two parameters sufficient to describe the normal probability distribution are μ and σ.

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