Chapter 7 – Confidence Intervals And Sample Size

Chapter 7 – Confidence Intervals and Sample Size

The Formula for the Confidence Interval of the Mean for a Specific  ,[object Object],[object Object],[object Object],[object Object]

Example ,[object Object],[object Object],[object Object]

Sample Size vs. Margin of Error ,[object Object],[object Object]

Formula for the Minimum Sample Size Needed for an Interval Estimate of the Population Mean ,[object Object]

7-3 Confidence Intervals for the Mean (  Unknown and n < 30)

Characteristics of the t Distribution ,[object Object],[object Object],[object Object],[object Object],[object Object]

Characteristics of the t Distribution ,[object Object],[object Object],[object Object],[object Object]

Formula for a Specific Confidence Interval for the Mean when  is Unknown and n < 30 ,[object Object],[object Object]

Example: Using the t-table ,[object Object],[object Object]

7-4 Confidence Intervals and Sample Size for Proportions

Symbols Used in Proportions ,[object Object],[object Object],[object Object]

Formula for a Specific Confidence Interval for a Proportion ,[object Object]

Minimum Sample Size for Proportion ,[object Object]

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