# Hypothesis, Drawing T-Distribution

• Apr 20th 2013, 07:51 PM
Past45
Hypothesis, Drawing T-Distribution
Same 1,

Let me give the figures.

H1:Mu<50, a simple random sample of size n=24 is obtained from a population that is known to be normally distributed.

If X(same mea)=47.1 and s=10.3.

B, If the researcher decides to test this hypothesis at the alpha+.05 level of signifacance, determine the critical value.

C- Draw a t-distribution.

A)=t0,-1.379
B=-t.005=-1.714

This is shaded with the left tail.

(-1.379>-1.714)

Part, it's basically self explanatory.. This gets shaded to the right, but why? The t0 was greater than t.010. It was -1.310>-t.10=1.383... It states decreases,isn't less than anything in those terms, shaded to the left?
• Apr 20th 2013, 08:46 PM
Past45
Re: Hypothesis, Drawing T-Distribution
Just to add, it's meant to be Classical Method, not PValue.
• Apr 21st 2013, 03:48 PM
Past45
Re: Hypothesis, Drawing T-Distribution
Essential I just want to know why is the hypothesis test here being shaded to the right when it clearly states she wants to "decrease wait time". Which will mean it is less than, right? So why is it a right tailed here for this?