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The following table shows the number of pieces of junk mail that arrives in my mailbox each day.Number of Pieces of Junk MailFrequency2231446516612What is the probability that 3 or fewer pieces of junk mail will be received today?Selected Answer:0.45Answers: 0.620.450.32
0.56Question 23 1 out of 1 pointsThe mean and the variance are equal for a ________ probability distribution.Selected Answer:PoissonAnswers: uniformbinomialnormalPoissonQuestion 24 1 out of 1 pointsThe ounces of soda consumed by an adult next month are an example of a discrete random variable.Selected Answer:FalseAnswers: True FalseQuestion 25 1 out of 1 pointsThe mean of the binomial distribution represents the long-term average number of successes to expect based on the number of trials conducted.Selected Answer:True
Answers: TrueFalse Question 26 1 out of 1 pointsThe mean of a discrete probability distribution needs to equal one of the values of the random variables.Selected Answer:FalseAnswers: True FalseQuestion 27 1 out of 1 pointsBecause of the ambiguity of the intervals, technically, it's not proper to calculate the mean and standard deviation of ordinal data.Selected Answer:TrueAnswers: TrueFalse Question 28 1 out of 1 pointsObserving whether a customer purchases or does not purchase an extended warranty for a new laptop would be best described using a uniform probability distribution.Selected Answer:FalseAnswers: True FalseQuestion 29 1 out of 1 points
The number of successes in a binomial experiment must range from zero to n.Selected Answer:TrueAnswers: TrueFalse Question 30 1 out of 1 pointsThe number of typographical errors found in a manuscript would best be described using a Poisson probability distribution.Selected Answer:TrueAnswers: TrueFalse