1. Fr. Chris Thiel 24 Feb 2005 St Francis High School
Chapter 11 T procedures
Fr. Chris Thiel
24 Feb 2005
St Francis High School

2. When to use Small sample size n
Population Standard deviation  unknown

3. 11.1 Inference for a population mean
T-Test
Data must be a SRS of size n from our population
Observations are normally distributed
 and  not known

4. Step 1 Identify Population & Parameter
State H0 and Ha in words and symbols

5. Step 2:State the Test One sample T-Test Matched Pairs T-Test
Two Sample T-Test
Two Sample Z-Statistic
VERIFY THE CONDTIONS AND ASSUMPTIONS
Justify your choice

6. Step 3 Calculate statistic
Calculate-Show the formula, where the numbers go into the formula and the result
Report the P-Value (or P(Z)<)

7. Step 4 Interpret
“There is (strong, some weak, little) evidence to reject the null hypothesis in favor of the alternative hypothesis suggesting that there may actually be more tea sold in China than in the United States”