Question 1174093
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Hi,
Normal Distribution:  μ = 1020  and   σ = 153 
What should his score be on this test so that only 10% of 
all examinees score higher than he does?  z = -1.282 (represent 10%)

{{{z =blue (x - mu)/blue(sigma)}}}
{{{-1.282 =blue (x - 1020)/blue(153)}}}  Solve for x

  153(1.282) + 1020 = x = 1216 (rounded to nearest whole number)
   
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