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January 30, 2015

January 30, 2015

Posted by **Sue 620** on Thursday, June 13, 2013 at 7:58pm.

(b) What proportion of Americans drink less than half the recommended 8 servings?

- Math help -
**PsyDAG**, Friday, June 14, 2013 at 1:22pm"less than half" = less than 2.3

Z = (score-mean)/SD

Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion/probability related to the Z score.

- Math check -
**Tom7**, Friday, June 14, 2013 at 2:01pmz=(8-2.3)/1.4=4.07 graph 0.99998

is this the right way and how do you change the graph numbers since they are all 9's that would need to be rounding?

- Math help -
**Sue 620**, Friday, June 14, 2013 at 2:05pmI worked it and got a different answer for the graph number 0.9893 and tom worked and got something totally different, what are we doing wrong, trying to work together on some of these?

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