- This topic has 3 replies, 2 voices, and was last updated 3 years ago by
.
- Posts
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?Answer = Z = (x – µ)/?
2.28 = (90-70)/?
0.4887 = 20/?
? = 20/0.4887
? = 40.92Mr Moffat can you please tell me if my answer is correct and can you please help me correct it if its wrong, i found this in the ACCA practice test and we’re not given the answers for it. Thanks a lot Mr Moffat, May god bless you.
This forum is primarily designed for students to help one another. If you want to ask the tutor something directly please use the ask the tutor forum-
https://opentuition.com/forum/ask-acca-tutor-forums/ask-the-tutor-acca-ma/
Hope this helps.
- You must be logged in to reply to this topic.