41. SAT Scores In 1995, scores on the Scholastic Aptitude Tests were re-scaled to their original mean (500) with an approximate standard deviation of 100 . SAT scores in the general population have a normal distribution.
(a) Approximately what percentage of the 1995 scores fell between 400 and 600 ?
(b) Approximately what percentage of the 1995 scores fell below 300 ?
(c) By 2001 the national average on the SAT Math section had risen to 514 . Is this number a parameter or a statistic?