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Re: O'level Maths, Addmaths and Statistics help available he
Statx ques :
7 (a) A school wished to estimate its examination costs per candidate for the coming year using the
previous year’s fees.
For each candidate there was a basic fee of $20 plus an additional fee of $30 for each subject
taken by that candidate. Using these figures, the school estimated that the cost per candidate
would have a mean of $230 and a standard deviation of $90.
However, before the entries were made, the fees had been increased to $25 per candidate
and $35 per subject.
Calculate the actual mean and standard deviation of the cost per candidate which the school
will have to pay for its examination entries in the coming year.
Statx ques :
7 (a) A school wished to estimate its examination costs per candidate for the coming year using the
previous year’s fees.
For each candidate there was a basic fee of $20 plus an additional fee of $30 for each subject
taken by that candidate. Using these figures, the school estimated that the cost per candidate
would have a mean of $230 and a standard deviation of $90.
However, before the entries were made, the fees had been increased to $25 per candidate
and $35 per subject.
Calculate the actual mean and standard deviation of the cost per candidate which the school
will have to pay for its examination entries in the coming year.