A researcher believes that a new training program will increase test scores. Previous research shows that test scores increase 8 points between the first and second administration of the test being used. This researcher believes his training program will cause a significant increase, beyond the expected 8 points. If a paired-samples t test is used by this researcher, what value would he expect to be at the center of the comparison distribution, a distribution of mean differences

Will mark brainliest, , and rate to only chrislaurencelleenzo is making a scale drawing of the rectangle below. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~imageenzo says that he can draw an enlarged rectangle that is 16 centimeters by 13 centimeters. which explains whether enzo is correct? enzo is correct because he used a factor of 2 to enlarge the rectangle.enzo is correct because he doubled one dimension and added the two lengths to get the other dimension.enzo is not correct because the enlarged rectangle should be 16 centimeters by 5 centimeters.enzo is not correct because he did not multiply the length and width by the same factor.