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October 22nd, 2013, 10:21 PM   #1
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Stats question/ continuous correction

The weekly amount spent by a small company for in-state 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 z-score then probability, but i'm confused by the last bit of info.

thanks.
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October 22nd, 2013, 11:13 PM   #2
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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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