Least squares regression problem

adeel
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Hi, I am having some difficulty with this problem:

what would be Y^h^a^t if s_y_/_x = 439, n = 24 and 95% confidence interval estimate for the average Y given a particular value of X is 1125 and 1695.

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I know Y^h^a^t = b_o + b_1x but I am not sure how I can use the information I have to get b_o or b_1
 
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