Date:         Tue, 10 Dec 2002 12:47:40 -0500
Reply-To:     "Snider-Lotz, Tom" <TSnider-Lotz@qwiz.com>
Sender:       "SPSSX(r) Discussion" <SPSSX-L@LISTSERV.UGA.EDU>
From:         "Snider-Lotz, Tom" <TSnider-Lotz@qwiz.com>
Subject:      Re: Grading Scale Conversion - Reply
Content-Type: text/plain; charset="Windows-1252"

See if this is what you want:

Let x = GPA (0.0 - 1.0)
Let y = grade (0.0 - 100.0)

When x is 0 to 0.4 (i.e x rounds off to 0), y is 0 to 64
When x is 0.5 to 1.4 (i.e. x rounds off to 1), y is 65 to 69
When x is 1.5 to 2.4 (i.e. x rounds off to 2), y is 70 to 79
When x is 2.5 to 3.4 (i.e. x rounds off to 3), y is 80 to 89
When x is 3.5 to 4.0 (i.e., x rounds off to 4), y is 90 to 100

If you plotted this out, there would be 5 straight line segments --
(1) goes from (0,0) to (0.5,65)  (these are the F's)
(2) goes from (0.5,65) to (1.5,70) (these are the D's)
(3) goes from (1.5,70) to (2.5,80) (these are the C's)
(4) goes from (2.5,80) to (3.5,90) (these are the B's)
(5) goes from (3.5,90) to (4.0,100) (these are the A's)

If this is right, all you need is to find the equations (y = mx + b) for the line segments and some IF's to select the right equation for each value of x.



>-----Original Message-----
>From: Harding Faulk [mailto:hfaulk@cheyney.edu]
>Sent: Monday, December 09, 2002 11:30 AM
>To: Snider-Lotz, Tom
>Subject: Re: Re: Grading Scale Conversion - Reply
>
>
>The grading scale that takes into account cut-off points for different
>grades.  For example, the scale would be as follows:
>
>100-90 = A
>89-80 = B
>79-70 = C
>69-65 = D
>64 and below = F
>
>I would appreciate any assistance you can offer.  Thanks.
>
>----- Original Message -----
>From: "Snider-Lotz, Tom" <TSnider-Lotz@qwiz.com>
>Newsgroups: bit.listserv.spssx-l
>To: <SPSSX-L@LISTSERV.UGA.EDU>
>Sent: Monday, December 09, 2002 11:03 AM
>Subject: Re: Grading Scale Conversion
>
>
>> Harding, do you want a straight linear transform (e.g. 0
>converts to 0, 1
>converts to 25, 2 converts to 50, etc.) or one that takes into
>account cut
>points for different grades (0 to 1 converts to 0-60, 1.1 to 2
>converts to
>61-70, etc.)?
>>
>> >-----Original Message-----
>> >From: Harding Faulk [mailto:hfaulk@cheyney.edu]
>> >Sent: Monday, December 09, 2002 11:09 AM
>> >To: SPSSX-L@LISTSERV.UGA.EDU
>> >Subject: Grading Scale Conversion
>> >
>> >
>> >Can anyone out there is SPSS land share with me the your
>> >syntax statement for converting a 4.00 grading scale to 0-100
>> >grading scale.  Thanks.
>> >
>>
>
>