raj works at a shop that rents bikes. each bike has a different id number. raj wants to check a random…

raj works at a shop that rents bikes. each bike has a different id number. raj wants to check a random sample of the bikes to see if they need new tires. determine whether each method results in a random sample of bikes from the shop. random not random check all bikes that are more than 3 years old. write the id numbers on slips of paper and choose 20 slips of paper without looking.

raj works at a shop that rents bikes. each bike has a different id number. raj wants to check a random sample of the bikes to see if they need new tires. determine whether each method results in a random sample of bikes from the shop. random not random check all bikes that are more than 3 years old. write the id numbers on slips of paper and choose 20 slips of paper without looking.

Answer

Explanation:

Step1: Analizar primer método

Al elegir solo bicicletas más viejas de 3 años, no es aleatorio. Está restringiendo la muestra a un grupo específico.

Step2: Analizar segundo método

Al escribir los ID en papeles y elegir 20 sin mirar, cada bike tiene la misma probabilidad de ser elegida, lo que es un muestreo aleatorio.

Answer:

  1. Not Random
  2. Random