2/In an analysis of variance, if F<.05, then: A)the null hypothesis should not be rejected B)the research hypothesis is most likely true C)the null hypothesis should be rejected D)between-groups variance estimate must be larger than the within-groups estimate. 5/An experimental psychologist interested in whether the color of an animal's surroundings affects learning rate tests 9 rats in a box with colorful wallpaper. The average rat of this strain can learn to run this type of maze in a box without any special coloring in 23 trials, with a variance of 16 and the distribution is normal. The mean number of trials to learn the maze for the rats tested with the colorful wallpaper is 25. What is the Mm? A)9 B)23 C) 16 D)25