Homework Help: buss/stats

Posted by tim on Tuesday, September 6, 2011 at 11:17pm.

Sorry the full question is A loaf of bread is normally distributed with a mean of22 oz. and a standard deviation of 0.5 oz.
a, what is the probability that a loaf is btwn 22.75and 23.00?
B, 5% of the loafs will weigh less than_____ ounces?
C, assuming 200 loaves are baked on a given day, how many of these will weigh more than 23 ounces? thanks for the help...

buss/stats - PsyDAG, Wednesday, September 7, 2011 at 11:02am
a. Z = (score-mean)/SD

Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportions related to the Z scores.

b. Use same table to get Z related to .05 in smaller portion and insert values in above equation to get score.

c. Use table to find proportion and multiply by 200.

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