Quizzes & Puzzles3 mins ago
Life Expectancy
I just heard on the news that life expectancy in England has risen to its highest level ever. The newsreader said that a man now aged 65 could now expect to live to 84. What does this mean? Does it mean 50% of English men can expect to live to 84 (and beyond)? Or more like 95% of English men can expect to live to 84 and beyond?
And how do they arrive at this figure? Almost everyone who was born in 1916 is dead now, so they can work out the total life expectancy of someone born in 1916. Add all the ages at death of a sample of people born in 1916 together and divide by the number of people in the sample. But how do you do that for a sample of people born in 1951, as they are not all dead yet?
And how do they arrive at this figure? Almost everyone who was born in 1916 is dead now, so they can work out the total life expectancy of someone born in 1916. Add all the ages at death of a sample of people born in 1916 together and divide by the number of people in the sample. But how do you do that for a sample of people born in 1951, as they are not all dead yet?
Answers
oh http://www.w ho.int/whosi s/whostat200 6Definitions AndMetadata. pdf says it is an AVERAGE number of years expected ( remember an average did not the half way point - 50% do and 50% dont that is called a median = very common error ) average is balanced - if you have a dataset 1,2,3,4,1000 - th average is add em all up and divide by 5 which is around 202 and you wil...
17:18 Sun 14th Feb 2016
oh
http:// www.who .int/wh osis/wh ostat20 06Defin itionsA ndMetad ata.pdf
says it is an AVERAGE number of years expected
( remember an average did not the half way point - 50% do and 50% dont that is called a median = very common error )
average is balanced - if you have a dataset 1,2,3,4,1000 - th average is add em all up and divide by 5 which is around 202 and you wil notice four points are below the average and one above
The median - the bumber at which 50% is above and 50% below is 3
for the second part of your question - life expedctancy when they arent all dead such as those born in 1950 - try googing Kaplan Meier survival curves and censored data.....
http://
says it is an AVERAGE number of years expected
( remember an average did not the half way point - 50% do and 50% dont that is called a median = very common error )
average is balanced - if you have a dataset 1,2,3,4,1000 - th average is add em all up and divide by 5 which is around 202 and you wil notice four points are below the average and one above
The median - the bumber at which 50% is above and 50% below is 3
for the second part of your question - life expedctancy when they arent all dead such as those born in 1950 - try googing Kaplan Meier survival curves and censored data.....
Hi PP- i mentioned the mean/median issue in the first post but i am not sure there will be much difference between the two in this case since there are not going to be any unusual values like one person living to 300 to distort the figures. Now if it's mean, I wonder if it was arithmetic mean or geometric mean...
I always enjoy your posts by the way, especially in Law. I'm not saying I understand them but they may me smile
I always enjoy your posts by the way, especially in Law. I'm not saying I understand them but they may me smile