Overview of Hypothesis Testing
Overview of Hypothesis Testing
Overview of Hypothesis Testing
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CI for the Mean, Unknown<br />
Variance<br />
• Pretty common<br />
• Uses the t distribution<br />
• Degrees <strong>of</strong> freedom<br />
⎛ tn− 1,1 −α/ 2s tn− 1,1 −α/ 2s⎞<br />
⎜<br />
X − ,<br />
X<br />
+<br />
⎟<br />
⎝ n<br />
n ⎠<br />
⎛ 2.064*38.6 2.064*38.6<br />
= ⎜<br />
220 − , 220<br />
+<br />
⎝ 25 25<br />
= (204.06, 235.93)<br />
⎞<br />
⎟<br />
⎠