1. ΣX                
2. ΣY                        
3. ΣXΣY                 
4. ΣXY  

XY

2 6

4 2

1 -1

3 -3

1. ΣX
2. ΣX2
3. (ΣX)2

     7, 5, 4, 6, 5, 3, 5

   6, 5, 7, 2, 5, 6, 3

1. construct a frequency distribution table.
2. sketch a histogram of the frequency distribution.           

4.For the following scores, construct a grouped frequency distribution table using an interval width of 5 points. Based on the table, what is the shape of the distribution? 

         30, 23, 58, 28, 35, 67, 74, 59, 27, 42, 46, 35

         51, 33, 18, 33, 25, 38, 48, 36, 31, 39, 63, 40

5.

Xf

82

73

64

55

42

31

22

1. find the mean, median, and mode.
2. if a new individual with a score of X = 2 is added to the sample, what are the new values for the mean, the median, and the mode?
3. if the score X = 5 in the original distribution is changed to X = 11, what are the new values for the mean, the median, and the mode?

6.

7.SS

SS