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Jet001 [13]
3 years ago
8

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?
Mathematics
1 answer:
Roman55 [17]3 years ago
5 0

Answer:

  • 2.28%

Step-by-step explanation:

<u>Given:</u>

  • μ = 80
  • σ = 12
  • x = 104

<u>Find z-score:</u>

  • 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%.

<u>Percentage of students earned more than $104:</u>

  • 100 - 97.72 = 2.28
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