A sample proportion of 0.62 is found. to determine the margin of error for the statistics a simulation of 200 trials run, each with a sample size of 100 and a point estimate of 0.62. the minimum sample portion for the simulation is 0.73 The maximum sample portion of the simulation is 0.97. what is the margin of error of the population proportion using an estimate of the standard deviation.

Statements reasons 1. ab ≅ cd; ad ≅ bc 1. given 2. ac ≅ ac 2. reflexive property 3. △adc ≅ △cba 3. ? 4. ∠dac ≅ ∠bca; ∠acd ≅ ∠cab 4. cpctc 5. ∠dac and ∠bca are alt. int. ∠s; ∠acd and ∠cab are alt. int. ∠s 5. definition of alternate interior angles 6. ab ∥ cd; ad ∥ bc 6. converse of the alternate interior angles theorem 7. abcd is a parallelogram 7. definition of parallelogram what is the missing reason in step 3?