Thirty-five math majors, 29 music majors and 26 history majors ...

[maychende]

Thirty-five math majors, 29 music majors and 26 history majors are randomly selected from 585 math majors, 279 music majors and 393 history majors at the state university. What sampling technique is used?
 
  A) stratified
  B) simple random
  C) cluster
  D) convenience
  E) systematic

Question 2

In a recent survey, 80 of the community favored building a health center in their neighborhood. If 15 citizens are chosen, what is the standard deviation of the number favoring the health center?
 
  A) 1.55 B) 2.40 C) 0.98 D) 0.55

[adf223]

Answer to Question 1

A

Answer to Question 2

A

[maychende]

TYSM

[shewald78]

Gracias!