Re: doubts...pls help

Posted by Homer Simpson on Jun 05, 2014; 7:49am
URL: http://discussion-forum.276.s1.nabble.com/doubts-pls-help-tp7591511p7591519.html

1)(b)

P(62<x<74) = 0.95
    Z-SCORE = 1.96

to find s.d -

- 1.96 = (62 - 68)/s
or, 1.96 = (74 - 68)s

=> s is approximately 3

2(b) 5!
3(d) SD independent of change in origin