Which of the following statements concerning the box plot and ...

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Which of the following statements concerning the box plot and z-score methods for detecting outliers is false?
 
  A) The z-score method uses the mean and standard deviation as a basis for detecting outliers.
  B) The box plot method uses the quartiles as a basis for detecting outliers.
  C) The z-score method is less affected by an extreme observation in the data set.
  D) The box plot method is less affected by an extreme observation in the data set.

Question 2

The number of traffic accidents that occur on a particular stretch of road during a month follows a Poisson distribution with a mean of 8.6. Find the probability that exactly five accidents will occur on this stretch of road each of the next two months.
 
  A) 0.000425 B) 0.005209 C) 0.072174 D) 0.144347

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Answer to Question 1

C

Answer to Question 2

B