Thirty-five math majors, 33 music majors and 45 history majors ...

[Deast7027]

Thirty-five math majors, 33 music majors and 45 history majors are randomly selected from 251 math majors, 518 music majors and 332 history majors at the state university. What sampling technique is used?
 
  A) stratified
  B) simple random
  C) cluster
  D) convenience
  E) systematic

Question 2

The grade point averages for 10 randomly selected junior college students are listed below.
 
  Assume the grade
  point averages are normally distributed. Find a 98 confidence interval for the true mean. Round to the nearest
  hundredth.
  2.0 3.2 1.8 2.9 0.9 4.0 3.3 2.9 3.6 0.8
  A) (1.55, 3.53 ) B) (0.67, 1.81 ) C) (2.12, 3.14 ) D) (3.11, 4.35 )

[ririgirl15]

Answer to Question 1

A

Answer to Question 2

A