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3 years ago

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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?

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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