Fr. Chris Thiel 24 Feb 2005 St Francis High School

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Presentation transcript:

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

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

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

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

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

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)<)

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”