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October 22nd, 2013, 10:21 PM  #1 
Member Joined: Oct 2012 Posts: 94 Thanks: 0  Stats question/ continuous correction
The weekly amount spent by a small company for instate travel has approximately a normal distribution with mean 1450 and standard deviation 220. What is the probability that the actual expenses will exceed 1560 in 20 or more weeks during the next year? the 20 or more weeks is really throwing me off. i understand how to do continuous correction and find zscore then probability, but i'm confused by the last bit of info. thanks. 
October 22nd, 2013, 11:13 PM  #2 
Member Joined: Oct 2012 Posts: 94 Thanks: 0  Re: Stats question/ continuous correction
and, also calculate the probability that the actuale xpenses would exceed 1500 for between 18 and 24 weeks, inclusive during the next year. 

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