Hello,
I'm having some trouble with this question. I thought I was doing this correctly but the answers from the back of my book say it is a different answer. It's been wrong before so I thought I would ask.
Q: Give the p-value of the t test in the following situation:
b) Upper-tailed test, df = 19, t = -0.4
What I did was just to look up the t-curve tails in the table in my book. The table only contains positive values of t. If I look up a degrees of freedom v=19 and t=0.4, the book gives a value of 0.347. But I thought I should be doing 1-0.347 to get the correct value since t is negative. This would give me a p-value of 0.653. But that's not what the answer key has - it says the answer is 0.347. Which should be correct?
I'm having some trouble with this question. I thought I was doing this correctly but the answers from the back of my book say it is a different answer. It's been wrong before so I thought I would ask.
Q: Give the p-value of the t test in the following situation:
b) Upper-tailed test, df = 19, t = -0.4
What I did was just to look up the t-curve tails in the table in my book. The table only contains positive values of t. If I look up a degrees of freedom v=19 and t=0.4, the book gives a value of 0.347. But I thought I should be doing 1-0.347 to get the correct value since t is negative. This would give me a p-value of 0.653. But that's not what the answer key has - it says the answer is 0.347. Which should be correct?