Asked by Anonymous
Statistics
The marks scored by a sample of 56 students are summarised by:
N=56
Sum of x =3026
sum of(x-the mean)^2 =15378
A) calculate the mean and the standard deviation
Mean I got - 54.04 (2.dp)
Standard deviation I got - 16.72 (2.dp)
Is this correct?
B) the formula y=1.2x-10 is used to scale the marks. Find the mean and the standard deviation of the scaled marks.
I am not sure how to do part B of this question. Please help.
Thank you :)
The marks scored by a sample of 56 students are summarised by:
N=56
Sum of x =3026
sum of(x-the mean)^2 =15378
A) calculate the mean and the standard deviation
Mean I got - 54.04 (2.dp)
Standard deviation I got - 16.72 (2.dp)
Is this correct?
B) the formula y=1.2x-10 is used to scale the marks. Find the mean and the standard deviation of the scaled marks.
I am not sure how to do part B of this question. Please help.
Thank you :)
Answers
There are no human answers yet.
There are no AI answers yet. The ability to request AI answers is coming soon!
Submit Your Answer
We prioritize human answers over AI answers.
If you are human, and you can answer this question, please submit your answer.