A manufacturer receives parts from two suppliers. A simple random sample of 400 parts from Supplier 1 finds 20 defective. A simple random sample of 200 parts from Supplier 2 finds 20 defective. Let p 1 and p 2 be the proportion of all parts from Supplier 1 and Supplier 2, respectively, that are defective. Is the difference statistically significant at the 5% significance level? To determine this, test the hypotheses H 0: p 1 = p 2 versus H a: p 1 p 2.

Jace wrote a sentence as an equation. 56 is 14 more than a number. 14+ = 56 which statement best describes jace's work? jace is not correct. the phrase more than suggests using the symbol > and jace did not use that symbol. jace is not correct. he was correct to use addition, but the equation should be 56+ p = 14 jace is not correct. the first number in the sentence is 56, so the equation should start with 56. jace is correct. the phrase more than suggests addition, so jace showed that 14 plus a variable equals 56. o