J

4 years ago

Usually there is no +c version as the convention is -c. Did you encounter +c somewhere eg. Some practice question?

Glittr

4 years ago

i haven’t encountered +c before hence wondering if +c formula does exist. btw can help take a look at my workings in pencil ? i didn’t use the usual formula . i used some summation formula instead . do u think it’s legit

J

4 years ago

Aren't the workings in your picture based on the notes' formula itself? Looks ok to me

J

4 years ago

Btw if you happen to encounter +c, just remember that + c = - (-c).

So you'll just have to swap the c in the formula for the mean to -c. As for variance, +c or -c doesn't affect it since it's a constant.

Glittr

4 years ago

thanks for the input ! looking forward to more in future

J

4 years ago

Welcome

Glittr

4 years ago

actually i just uploaded my working ... didn’t realise that it hadn’t uploaded earlier ... haven’t grasped the app yet lol
can help me take a look pls ...