Question 1197346
<pre><font face = "consolas" color = "indigo" size = 3><b>
Hi  
µ = 460 and σ = 40
What percentage of high school boys can run a mile in faster than 400 seconds?
 P(x> 400) = 1 - P( x ≤ 400) = 1 - normalcdf(smaller, larger, µ, σ) 
                    P(x> 400)= 1 -normalcdf(-9999, 400, 450, 40) = 1 - .0668 = .9332
                                          -9999 being a place holder for the smaller number
NOte: σ = 40, 400 is 1.5sd below mean. 
  What percentage of high school boys can run a mile in faster than 400 seconds?
               93.32%
Wish You the Best in your Studies.
</font></b></pre>