1. NO. The first sign is "the sum of the squared x scores" while the second is the "sum of the x scores, all squared". The first requires that we first square the x scores then sum them, while the second requires that we sum the x scores then square that total.
2. The scatterplot is defeined as the graph of paired x and y
scores. By plotting these scores we can visually see the pattern of x and y
scores. For example, a scatterplot that shows a pattern of increasing
scores will show a positive correlation. The closer all the scores are in a
straight line the higher the pearson r will be. Similarly, if the scatterplot
shows a pattern of decreasing scores...
1. 83.86 and 116.64