|Link to pic of Commodore S61|
Message #9 Posted by Gene on 6 Feb 2003, 8:38 p.m.,
in response to message #1 by Gene
Commodore S61 picture
I still remember in the late 1970s when this calculator was introduced. I was amazed it had THIS many statistical functions pre-programmed!
Row 2 from top:
The first key from the left is to calculate the F-distribution or the Hypergeometric distribution. What are the v1 and v2 keys for? What are they used to input? Then there is the 4th key from the left is labeled tstat and Zstat. What are these for?
Row 3 from the top:
The first key is for a Chi-squared fit? What is that for? Then there are two keys labeled Oi and Ei. What are these? Then there is the t DEP and t IND. I imagine those are for calculating the t-values for the dependent and independent variables of a linear regression, which would go along with the remainder of the keys on this row which are regression related.
Row 4 from the top:
First key does permutations and combinations. 2nd key does Binomial and Poisson distributions. Then there is the key for V and k. K is used to enter values for the binomial calculation (so is the p key next to it), but what is the v key for? The remainder of the keys on this row are regression related.
Row 5 from the top:
The first key calculates the cumulative normal distribution given a Z value. The shift of this key does the inverse. The next key calculates the normal distribution area under the interval of +Z and -Z. The shift of this key does the inverse, i.e., given an area under the curve, it returns the Z forming the interval. The next key is for the Chi-squared distribution and the shift is for a t-distribution (which requires the number of degrees of freedom, but where is that entered?)
Row 7 from the top:
The factorial key has the gamma function as a shifted function