A college placement office conducted a survey of 100 engineers who had graduated from Stanford ...

A college placement office conducted a survey of 100 engineers who had graduated from Stanford University. For these engineers, the mean salary was computed to be 72,000 with a standard deviation of 8,000.
 
  The percentage of these engineers who earn more than 96,000 or less than 48,000 is:A) approximately 0.
  B) at least 5.6 (1/18 of the engineers).
  C) at most 5.6 (1/18 of the engineers).
  D) at most 11.1 (1/9 of the engineers).

Q. 2

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.

Q. 3

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

Q. 4

A table used to organize data where the left column includes classes or groups and the right column includes the frequencies or observation for each class is called a:
 
  A) crosstab.
  B) frequency distribution.
  C) relative frequency distribution.
  D) class chart.

Q. 5

Based on his knowledge of the causes of stoppages, the manager states that the probability that production line 1 is stopped next is 25. This is an example of:
 
  A) subjective probability.
  B) classical probability.
  C) relative frequency probability.
  D) Bayesian probability.