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49 students are selected at random from sophomore class 39 from the junior class and 48 from senior class what type of sampling is used simple random ,stratified , systematic ,convenience

Respuesta :

Answer:

(B)Stratified

Step-by-step explanation:

Stratified sampling refers to a sampling method in which the entire population is first divided into groups/strata before a random sample is taken from each strata.

The school population in this case has been divided into these strata,

  • Sophomore class
  • Junior class; and
  • Senior class

From these classes, a random sample of 49,39 and 48 students respectively was then taken,

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