Math

4 Step Process for confidence- State

State: what parameter do you want to estimate, and at what confidence level?

Ex: with 99% confidence we can estimate the true proportion/mean of Pennie’s more than 10 yrs old from Mrs. Quinn’s collection.

4 Step Process for confidence- Plan

Check if it is a SRS

Check 10 percent condition 10n <_ 10

Check sample condition np/nq >_ 10

4 Step Process for confidence- Do

Use one of two formulas to solve

4 Step Process for confidence- conclude

Give conclusion of interval

Ex:

We are 99% confident that the interval from 43.22% to 68.55% will capture the true proportion of pennies more than 10 years old from Mrs Quinn’s collection.