I know I have to use the equation "Z = x - mean/standard deviation" and then look up the AUC in a table for all of these questions, but all these problems are different. And if anyone knows of any good statistics websites, please link to it!
The brain weights of a certain population of adult Swedish males follow approximately a normal distribution with mean 1,400 g and standard deviation 100g. What percentage of the brain weights are:
a) 1325 and 1500g?
b) 1325g or more?
c) 1500g or less?
d) between 1475 and 1600g?
04-03-2008, 11:33 PM #1
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04-03-2008, 11:36 PM #2
04-03-2008, 11:44 PM #3
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The (1400 - 1500) / 100 = 1 std deviations = 0.1587 (right tailed). Subtract that **** and you get....(.7734 - .1587) = .6147
Just thing logically and use this website http://www.tutor-homework.com/statis...cs_tables.html
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