Thursday, February 14, 2008

Quiz #4

Q: Suppose the z-score of xbar is 1.34. Calculate the p-value associated with this z-score.

A: The p-value is the area under the curve of the normal distribution above the given value. From the standard normal distribution table we find that from the mean to 1.34, the area is 0.4099. Since we know that the area under the curve above the mean is 0.5,
p-value of 1.34 = 0.5-0.4099 = 0.0901


Mimie said...

This is a great picture of our Winter in Chicago!

Eliezer said...

Thanks, Mimie. It's a shot of the benches along the lakefront path at Oak Street Beach after a recent snowfall.