Find the missing value of p for the following distribution whose mean is 12.58


x:



5



8



10



12



p



20



25



y:



2



5



8



22



7



4



2



X



y



yx



5



2



10



8



5



40



10



8



80



12



22



264



P



7



7p



20



4



80



25



2



50




N = 50



∑yx = 524 + 7p



Given,


Mean = 12.58


= 12.58


= 12.58


524 + 7p = 12.58 (50)


7p = 629 – 524


p = = 15


6