*According to www.umich.edu/~isa/incoming/housing.html, in 2007 the monthly rental rates for one bedroom apartments in Ann Arbor, Michigan had a mean of $700. Suppose those rental rates have approximately a normal distribution, with a standard deviation of $150. Using a table, calculator, or software that can give normal probabilities, find the approximate proportion of one-bedroom apartments for which the rental rate:*

a) is at least $1000 a month

b) is less than $500 a month.

c) is between $500 and $1000 a month.

a) is at least $1000 a month

b) is less than $500 a month.

c) is between $500 and $1000 a month.

**MY ATTEMPT TO ANSWER THE QUESTION THUS FAR:**

a. = .025 (at least that's what I got by using the empirical rule....am I right?)

as for b and c, I've tried using a table at the back of my book entitled "Standard Normal Probabilities", I'm not sure how to use it because the numbers I get just don't make any sense. For instance, somehow I got the numbers .0982 for "b" and .725 for "c" while working on this problem at Panera bread earlier today and I have no clue how I got those numbers and even when I got them earlier today I wasn't sure if they were right.

Could anyone give me some help? This is due in about 14 hours (2pm Easter Standard Time for the U.S.).

Any and all help would be most appreciated.

Thanks in advance.