Acertain college randomly selected 30 freshman students who completed college algebra during their first semester. fifteen students were chosen from students who took the course at night and 15 students were chosen from students who took the course during the day. the following statistical information was calculated from their final grades. day night mean 76 68 median 68 72 mode 64 72 range 38 53 based on these samples, what generalization can be made? (assume that a score of 70 or greater is a passing score.) a. the mean score for the night students was higher than the mean score for the day students. b. the median score for the day students was higher than the median score for the night students. c. the mean score for the day students was higher than the mean score for the night students. d. the range of scores was larger for the day students than for the night students.

It's C because if you look at the day and night students, the mean score for the day students was actually higher then the mean score for the night student.

for the friend request.

when a figure, such as triangle (xyz) is reflected over the line y = x to create x'y'z' the x-coordinates and y-coordinates of the original image (pre-image) will be reversed for the image. (e.g., (x, y) > (y, x)) this means that the pre-image position of the x- and y-coordinates switch places which in turn provides a mirror like image of the original xyz.  

i notice that when i draw a line segment from x to x', that the points are parallel from each other -- they are exactly across from each other and do not intersect with any other points.  

yes, think i would see the same characteristic if you drew the line segment connecting y with the reflecting line and then y' with the reflecting line because of the essence of reflections. because it is a mirror image, each point was effected the same way which leads me to conclude that they same would apply to y and y'.