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apr08 exam Q 8

L

lalala

Member
Can anyone help me out? I'm wondering how to calculate the beta's for part 2 of this question from the confidence intervals given?
 
April 08 exam question 8

Can anyone help me out? I'm wondering how to calculate the beta's for part 2 of this question from the confidence intervals given?

Hi, they've used the formula for confidence intervals. That is:

So taking Violin for example

B1 + z*SE(B1) = 0.19
B1 - z*SE(B1) = -0.05

Addind these two together (solving by simultaneously equations) this becomes

2B1 = 0.14 and finally B1 = 0.07

A similar method has been used to calculate B for the others.

Hope this helps.
 
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