Calculating P-Values for H_0: \mu =\mu_0

[Punchlinegirl]

Homework Statement

Suppose that we are testing H_0: \mu =\mu_0 versus H_1: \mu \neq\mu_0. Calculate the P-value for the following observed values of the test statistic.
a: z_0 =2.45
e: z_0=-0.25

Homework Equations

none

The Attempt at a Solution

I got part a by using the equation, P=2[1-\Phi(z_0)]. I got the value for the probability from the table in the book since it's a normal distribution and the p-value was equal to .014286.
Then for part e, I tried using the same equation as before, but I got a p-value of 1.19. My equation was P=2[1-.401294]
Can someone help with what I'm doing wrong? Thanks in advance

 

[EnumaElish]

For part (e), use \Phi(-z) = 1 - \Phi(z).