Statistics
posted by needhelp
Do you drink the recommended amount of water each day? Most Americans don't! On average, Americans drink 5.4 eightoz servings of water a day. A sample of 36 education professionals was randomly selected and their water consumption for a 24hour period was monitored; the mean amount consumed was 46.8 oz. Assuming the amount of water consumed daily by adults is normally distributed and the standard deviation is 10.9 oz, is there sufficient evidence to show that education professionals consume, on average, more water daily than the national average? Use α = .05.

PsyDAG
Multiply 5.4 by 8 to get in the same units.
Z = (scoremean)/SEm
SEm = SD/√n
Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion/probability for your Z score. 
marcus
if your him department has 100,000 active medical records and you received 5352 request for records within a 6 month period, what is the request rate for the past 6 months? round to 2 decimal points.
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