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Hi,
im just going through past exams concentrating on summarising and analysing data in particular.
However, I would really appreciate some assistant in how to tackle a couple of question. Ive been racking my brain trying to find the answer:
1) The number of quarterly complaints to a local school has a mean of 50 and the coefficient of variation is 20%.
What is the variance for the number of quarterly complaints?2) The percentage probability that a student will score more than 90 marks in an accounting exam is 2.28%. The marks scored from the accounting exam follow a standard normal distribution with a mean mark of 70.
What is the standard deviation for the distribution?3) The number of daily complaints to a local government office has a standard deviation of 7 and the coefficient of variation is 20%.What is the mean number of daily complaints?
Thank you so much,
Kindest RegardsI am puzzled as to how you have been working through past exams, because the ACCA do not publish past exams for Paper MA (and everyone gets different questions for each other anyway) 🙂
However I do suggest that you watch my free lectures, because as I explain in the lectures the coefficient of variation is the standard deviation divided by the arithmetic mean. Also, the variance is the standard deviation squared.
Those two definitions make all three of your questions very simple.
For question (1), the standard deviation / 50 = 0.2. Therefore the std deviation is 10, and therefore the variance = 10^2 = 100.
Your other two questions are using the same two definitions.
The lectures are a complete free course for Paper MA and cover everything needed to be able to pass the exam well.
Hi Mr Moffat,
Thank you for clearing that up. Am I right in saying that the answer to 2) mean- 1.4 and 3) standard dev – 1.96?
Hi Mr Moffat,
Hope you are well. Thank you for your response.
I was having problems regarding applying the knowledge from your lectures to exam questions from the revision book. I decided to purchase some practice exams from the ACCA website and have been going through these to see if I can apply the knowledge I have gained from your lectures.
I now understand the questions above, just need to apply the knowledge in a slightly different way. Thank you.Is there anything you suggest for me to do relating to the exam? Im listening to your lectures for a 2nd time now, taking each topic and then using the revision guide/practice exam questions to attempt to apply the knowledge I’ve gained in your lectures. I feel overwhelmed with the amount of calculations needed to be learnt and understood, but I think this is just a matter of practice to overcome this feeling? Ive noticed theres a lot of questions concentrating on standard costing and budgeting and absor and Marg costing in the practice papers I’ve had a look at, so I’m trying to be as confident as possible regarding these topics. Is there any advice you have relating to preparing for this exam? My exam is on the 31st of March.
Kindest Regards,
KedeshI assume that by ‘revision book’ you are meaning either the Revision Kit from BPP or the Exam Kit from Kaplan (they are both similar and both good, but they use different names 🙂 )
If that is the case then keep practicing. If you have done all of the questions then do them all again. Very important is to attempt the mock exams under exam conditions (especially sticking to the time allowed, because it when under time pressure that people misread questions or make silly mistakes).
Hi Mr Moffat,
Yes, exactly that. The one I’m using is from BPP
Okay, I will keep at it.
Thank you so much for getting back to me, as well as your advice. Its honestly much appreciated.Stay Safe.
Kindest Regards,
Kedesh
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