Let event A be that there are more than three defects and let ...

[lak]

Let event A be that there are more than three defects and let event B be that there are four or fewer defects. Which of the following statements is true?
 
  A) P(A  B) = 0.18
  B) P(A  B) = 0.07
  C) Events A and B are collectively exhaustive.
  D) Events A and B are mutually exclusive.

Question 2

The following ten scores were obtained on a 20-point quiz: 4, 5, 8, 9, 11, 13, 15, 18, 18, and 20.
 
  The teacher computed the usual descriptive measures of center (central tendency) and variability (dispersion) for these data, and then discovered an error was made. One of the 18s should have been a 16. Which of the following measures, calculated on the corrected data, would change from the original computation?A) median
  B) arithmetic mean
  C) range
  D) geometric mean

[Anna]

Answer to Question 1

C

Answer to Question 2

B

[lak]

Excellent

[matt95]

Thanks for the timely response, appreciate it