PettswoodFiona wrote:
Ah, I was referring to the INCAS which is a form of CAT test and the max for that is 145. I Must be different if the range is different. Sorry for any confusion. I think however the similarities will be that they have a bell curve where there is a cluster of results around the average which is usually 100 and then anything within 15 marks of the average score either up or down will cover 85% of sitters, or at least that is how it is with the INCAS. Anything at the extreme ends is less common. 130 or above is top 5%, top score is top half percent.
The max on INCAS is 141 I believe, not 145. 1 SD either side of 100 (i.e. 85 - 115) is where most people (68%) will fall. a further 14% will be 1 SD lower( between 70 and 85 ) and a further 14% will be 1 SD higher (between 115 and 130) thereafter, it is 2% at the extremes of the ranges (so the remaining 4% in total)
Thats how I read it anyway...