andreac811
contestada

Last summers, students who worked earned an average of $80 a week with a standard deviation of $12. What percentage of students earned more that $104 per week?

Respuesta :

mhanifa

Answer:

  • 2.28%

Step-by-step explanation:

Given:

  • μ = 80
  • σ = 12
  • x = 104

Find z-score:

  • z = (x - μ)/σ
  • z = (104 - 80)/12 = 2

Percent value corresponding to 2 as per z-table is 0.9772. This is corresponding to 97.72%.

Percentage of students earned more than $104:

  • 100 - 97.72 = 2.28

Otras preguntas