The distribution of ages for all Oscar winning actors at the time they receive the award is approximately normal with a mean of 44 years and standard deviation of 9 years.  The 68-95-99.7 Rule / Empirical Rule: Sketch the density curve and fill in the blanks for (a) through (c) 68% of the actors received Oscars between the ages of  ________ and ________.   95% of the actors received Oscars between the ages of _________ and ________.   99.7% of the actors received Oscars between the ages of ________ and ________.

MATLAB: An Introduction with Applications
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The distribution of ages for all Oscar winning actors at the time they receive the award is approximately normal with a mean of 44 years and standard deviation of 9 years. 

The 68-95-99.7 Rule / Empirical Rule:

  • Sketch the density curve and fill in the blanks for (a) through (c)












  1. 68% of the actors received Oscars between the ages of  ________ and ________.

 

  1. 95% of the actors received Oscars between the ages of _________ and ________.

 

  1. 99.7% of the actors received Oscars between the ages of ________ and ________.



Finding Percentiles

 

  1. What percent of actors received the Oscar after the age of 55?  (Draw the density curve and shade the area of interest).














  1. What percent of actors received the Oscar before age 25? (Draw the density curve and shade the area of interest).







  1. What percent of actors received the Oscar between the ages of 50 and 70?












Finding Observations Given a Percentile:

 

  1. The top 20% of actors received the Oscar after the age of___________






  1. The bottom 15% of actors received the Oscar before the age of _________.  
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68% of the actors win the Oscar between the ages of ____ and ____.

 

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