Which data set has a wider spread? why? set a: {9, 11, 24, 11, 4, 20, 16, 7, 18, 15, 28, 6} set b: {9, 12, 15, 3, 21, 24, 5, 9, 16, 21} set a has a wider spread because it has more data values than set b. set a has a wider spread because its mean is greater. set a has a wider spread because its range is greater. set b has a wider spread because its median is greater. set b has a wider spread because it is bimodal. nextreset

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?