ttest function

[feifeipan]

I wanna use ttest to test if my data(in array) is normal distribution.

What's the params "value" means in the ttest function

jStat.ttest( value, array, sides)?

Thanks.

[trevnorris]

To be honest I'm not completely sure. That was contributed, and I don't fully understand the statistics. The code shows that the value is passed to tscore, so I'm assuming it's the same as in the following:

jStat.tscore(value, array)
Returns the t-score of value given the data from the array.

[mcclella]

t-tests in general are for comparing the mean of an array to either an a priori value or to the mean of another array. It is not appropriate for determining if the data values in an array are consistent with the normal distribution. The Kolmogorov-Smirnov test or others are appropriate for that. I don't think those are implemented in jStat.

[trevnorris]

All the implemented statistical tests are listed here http://jstat.github.io/test.html

If you find they're not implemented correctly please let me know. That was a community contribution, but they forgot to add proper tests.

[trevnorris]

Closing for no follow up.