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Important Ideas

4 Cs

Choose - Procedure and relevant info

Check - 3 Conditions

Calculate - Formula & work that went into it

Conclude - in context. if you write your conclusion as a complete sentence you can automatically do context so she recommends you do a complete sentence

Choosing Sample Size

Marg of Err = z* * sqrt( phat ( 1- phat) / n )

solve for n

critical value ( invnorm )

  • if phat is unknown, use a “conservative estimate”
    of phat = .5