+0  
 
+1
134
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avatar+524 

There are 2 cardboard boxes. Each of them has 6 tiles numbered as 1,1,2,3,3,4. Find the variance of the distribution of the expected values of getting a total of 2,3,4,5,6,7 and 8 when one picks two tiles at a single event and this event repeats for 36 times assuming the picked tiles are replaced on every repitition. 

 Jun 9, 2021
 #1
avatar+114818 
+1

I really do not know but this is my best guess.

 

the variance is down the bottom of the 2nd diagram.

 

 

 

 

https://www.calculatorsoup.com/calculators/statistics/statistics.php

 

 Jun 11, 2021
 #2
avatar+524 
0

Yes its absolutely right, apart from the fact that I got the mean as 4.8 and when I solved it with this value I got the variance as 2.46. But I guess that minute difference can be ignored right? 

amygdaleon305  Jun 11, 2021
edited by amygdaleon305  Jun 11, 2021
edited by amygdaleon305  Jun 11, 2021
 #3
avatar+114818 
+1

I think you made a mistake when you worked out your mean

the sum of all the scores is 168, the number of scores is 36 

 

 So the average is  4.6repeater.

 

8+12+36+40+36+28+8 = 168

Melody  Jun 11, 2021
edited by Melody  Jun 11, 2021
 #4
avatar+524 
+1

Oh yeah! You're right thanks. 

amygdaleon305  Jun 11, 2021

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