topic Re: non normal data in Statistical Procedures

non normal data

chuie — Mon, 21 Jan 2019 21:19:55 GMT

Hi There,

I have Length of Stay (LOS) data and it is not normal/skewed to right. So my questing is : When we have not normal distribution, how do we interpretate the average of not normal distribution? My understanding for normal distribution is that 68% of the data falls within 1 SD away from the average. But for non normal we cannot say that. when data is not normal it is best to sue median instead of mean.

when I transform the LOS data , how to interpretae the average of log transform ? How do we deal with calculating average of non normal distribution

please help

Thank you

Re: non normal data

Reeza — Mon, 21 Jan 2019 21:27:31 GMT

Or you report the Median instead of the Mean.

Re: non normal data

Reeza — Mon, 21 Jan 2019 21:28:09 GMT

You can calculate the mean of the transformed variable and the confidence intervals and then back transform into the normal units, but that's hard to explain.

@chuie wrote:

Hi There,

I have Length of Stay (LOS) data and it is not normal/skewed to right. So my questing is : When we have not normal distribution, how do we interpretate the average of not normal distribution? My understanding for normal distribution is that 68% of the data falls within 1 SD away from the average. But for non normal we cannot say that. when data is not normal it is best to sue median instead of mean.

when I transform the LOS data , how to interpretae the average of log transform ? How do we deal with calculating average of non normal distribution

please help

Thank you

C

Re: non normal data

chuie — Mon, 21 Jan 2019 21:32:28 GMT

do you have link where I can read about back transformation?

If we back transform the unit then can we interpretae the average as if that is normal distributed?

Re: non normal data

Reeza — Mon, 21 Jan 2019 21:34:06 GMT

No, that's why it's hard to explain 🙂