• We need your support!

    We are currently struggling to cover the operational costs of Xtremepapers, as a result we might have to shut this website down. Please donate if we have helped you and help make a difference in other students' lives!
    Click here to Donate Now (View Announcement)

Mathematics: Post your doubts here!

V

vaishster

Messages
32
Reaction score
0
Points
0
in statistics NORMAL DISTRIBUTION FORMULA (X-mu)/sigma... u hav 2 add or subtract 0.5 to the value of X depending on the sign rite ??... but in some paper mark schemes.. they dnt do it and in some they do add or subtract 0.5 to X... how can u b sure of wen 2 do this.. its really important cuz ading or subtracting 0.5 changes the whole probalbility and the answer becomz wrong.... !!!
 
I

IgoforA

Messages
105
Reaction score
1
Points
0
yes it's important vaishster it just that you need to remember when you change binomial to normal, you must carry out the continuity correction... method by either adding or subtracting 0.5. simple! you just need to remember if it is less than and greater orequal to you must subtract it by 0.5 and if it is less than or equal to and greater than you just need to add it by 0.5
 
You must log in or register to reply here.
Top