A researcher examined the effect of background noise level on memory performance of college students. Students were randomly assignment to one of two groups. Students in the first group were given a memory test in a room with a low level of background noise and students in the second group were given the memory test in a room with a high leve of background noise. The memory scores of the two groups are shown below. Set alpha at .05 and determine if background noise level had a significant effect on memory scores Low noise level scores: 8, 10, 6, 8, 10, 6 (SD = 1.788854) High noise level scores: 1, 3, 4, 7, 5,4 (SD = 2) What is the IV? Select one: O a High memory scores O b. The participants Oc High background noise Od Memory scores O e. Background noise Of Low background noise O g. Low memory scores