How are these answers gathered? From the z-table? a) P( Z>/ Z 0 ) = 0.5.....I do

Question

How are these answers gathered? From the z-table? a) P( Z>/ Z0 ) = 0.5.....I don't see howto get 1.645. How are these answers gathered? From the z-table? a) P( Z>/ Z0 ) = 0.5.....I don't see howto get 1.645.

Explanation / Answer

I think you mean P(Z > 1.645) = .05 This is the value for 1.645 from the Z-table. Look down the left side column until you get to 1.6 Now go across the columns until you get under 0.04 (combined these values are 1.64) You should be at a value very close to .05. To get closer, weusually go halfway to the next value on the right so we are under .045. This gives us exactly 1.645

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