Qualification > Math
STATISTICS DOUBT!!! PLZ REPLY ASAP!!!
Arthur Bon Zavi:
--- Quote from: I Jimmy I on May 23, 2011, 08:16:43 pm ---Ye that was my only doubt :D
Other working is easy :D Just wanted to understand the concept! Anyways tyvm for confirming :D
--- End quote ---
Otherwise, you know what to do when value of z is positive or negative right ? Or make two equations and find mean and standard deviation.
I Jimmy I:
I didnt quite understand what you meant. Could u give a question as an example plz? :)
Arthur Bon Zavi:
--- Quote from: I Jimmy I on May 23, 2011, 08:26:45 pm ---I didnt quite understand what you meant. Could u give a question as an example plz? :)
--- End quote ---
Question 3 :
http://www.xtremepapers.me/CIE/International%20A%20And%20AS%20Level/9709%20-%20Mathematics/9709_s10_qp_61.pdf
Just try these types. They cover almost whole normal distribution and will make the topic easier for you.
I Jimmy I:
Good news, I solved it with ease but that was definitely a first in using simultaneous equations in statistics or atleast the questions I covered.
Again TYVM for bringing this up :)
I Jimmy I:
I got this other doubt in question 7(iii) of Oct/Nov 2006
The question is, Using a suitable approximation, calculate the probability that the number of small bands in the office pack is between 88 and 97 inclusive!
My doubt is how to write the inequality...? Whether to write it as 88<X<97 OR 88<=X<=97!
The reason Im asking is because this affects the c.c(continuity correction) while solving the question and therefore get a wrong answer :(
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