
Probability and Statistics Basic Probability and Statistics Math Forum 
 LinkBack  Thread Tools  Display Modes 
May 9th, 2017, 04:09 PM  #1 
Newbie Joined: May 2017 From: texas Posts: 1 Thanks: 0  Stats fraction
If a pizza place give you free pizza after 30 minutes or less and the mean is 18.9 with a standard deviation on 4.5 what fraction of the customers gets free pizza? help pleaseee

May 9th, 2017, 04:30 PM  #2 
Senior Member Joined: Sep 2015 From: Southern California, USA Posts: 1,600 Thanks: 816 
$1\Phi\left(\dfrac{3018.9}{4.5}\right) = 0.68\%$


Tags 
fraction, stats 
Thread Tools  
Display Modes  

Similar Threads  
Thread  Thread Starter  Forum  Replies  Last Post 
How to simplify a fraction times by a fraction  Sammy  Elementary Math  2  August 15th, 2014 03:46 AM 
fraction in negative exponentiation fraction  ThePope  Elementary Math  3  November 4th, 2012 07:05 AM 
How can I move a fraction to the bottom of a fraction  daigo  Algebra  3  July 15th, 2012 02:05 AM 
Basic Algebra, fraction of a fraction...  Tommy_Gun  Algebra  5  June 3rd, 2012 07:14 PM 
Fraction and Fraction Sum Substitution  K Sengupta  Elementary Math  1  February 9th, 2010 04:34 AM 