Data-gathering bias can be reduced by sampling. Indicate ...

[corkyiscool3328]

Data-gathering bias can be reduced by sampling.
 
  Indicate whether the statement is true or false

Question 2

What number will the following query in the HAPPY INSURANCE database return?
 
  SELECT count (DISTINCT column_name)
  FROM user_tab_columns;
 
  A) 2
  B) 3
  C) 10
  D) 13

[Brenm]

Answer to Question 1

TRUE

Answer to Question 2

D