dufka Posted May 2, 2011 Report Share Posted May 2, 2011 How to do it????Find how many houses have a number of bedrooms greater than one standard deviation above the mean?mean = 2.73óx=1.34Number of bedrooms Number of houses1 412 603 524 325 156 8Total: 208HELP!! Reply Link to post Share on other sites More sharing options...
jess1ca Posted May 3, 2011 Report Share Posted May 3, 2011 You have to find the number of houses whose number of bedrooms are not between (2.73 + 1.34) and (2.73-1.34) Reply Link to post Share on other sites More sharing options...
puyol9 Posted June 19, 2011 Report Share Posted June 19, 2011 One standard deviation above the mean - 2.73+1.34 = 4.07Therefore, the number of bedrooms must be greater than 4.07.Thus, the number of bedrooms must be either 5 or 6 (as these are the only two options with number of bedrooms greater than 4.07)There are 15 houses with 5 bedrooms.There are 8 houses with 6 bedrooms.Add these together 15+8=23Thus, there are 23 houses with either 5 or 6 bedrooms. 23 houses with number of bedrooms greater than 4.07 23 houses with number of bedrooms greater than one standard deviation above the mean. Reply Link to post Share on other sites More sharing options...
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