STUDENT_T_CUTOFF (P, nf) Returns the student - t cutoff
|Arguments:||P||Confidence Limit, percent
Must be 90, 95, or 99
|nf||number in sample|
Inherited from Argument 2
|Y||Inherited from Argument 2|
|Z||Inherited from Argument 2|
|T||Inherited from Argument 2|
Returns the student's - t cutoff for the given confidence limit and degrees of freedom.
yes? ! for the correct result send the number in the sample, plus 1. yes? let nf = `var,return=Lsize` + 1 yes? let student_cutoff = STUDENT_T_CUTOFF( 95, nf )
The function STUDENT_T_CUTOFF is called by the script correlation_with_students_t_test.jnl, taking definitions made by a call to the script variance.jnl to return the degrees of freedom, covariance, correlation, correlation for confidence level P. To see the script's description:
yes? go/help correlation_with_students_t_test \can mode verify ! correlation_with_students_t_test: computes correlation, r, between 2 variables (e.g. time series) ! and answers the question via a students t test: ! Is r significantly different from 0 with 90, 95 or 99 percent confidence? These are your only 3 input choices. ! First, run VARIANCE.JNL with its required inputs (see VARIANCE.JNL documentation). ! Then run this script. ...