And further down that page you'll find that 1.96 gives the right probability.

Values for the table cannot be easily calculated which is why people use the table.

Bob

]]>I'm assuming this is a normal distribution problem.

I cannot make those figures (P = 0.025 and Z = 0.7) go together. Is there more to this problem or have I got the wrong model?

Have a look at the interactive normal curve / table at

http://www.mathsisfun.com/data/standard … table.html

Bob

]]>The "Z.025" part looks like this:

http://i.imgur.com/CnZdc.png (didn't know how to type it out)

The answer is .70, but I don't know how it was calculated.

]]>