I need help with the last two columns and both parts of question 3

1. Compute by hand the z-scores for the following sample data. Round to 2 decimals places and SHOW YOUR WORK! X - X Z = E (X - X) 2 SS S n-1 n-1 Fill out the table and the blanks below based on the dataset X = 12, 18, 13, 22, 14, 17 which is listed in the table. variance Erand des.. n = x = lu $ 2 = 14 3.74 SS : 70 Sample thean Sum of sqrs X X- X ( X- x)? Above or below the 12 1 12- 14 mean? = - 4 (- 4 ) 2 = 14 - 4 3.74 - 1.07 18 18- 14 : 2 (2) 2 - 4 2 3.74 = 0.53 13 13-14 s - 3 (-3) 2 = 9 - 3 3.74- 0.80 22 22-14 = 10 3.74 1.40 14 14-14 : - 2 ( - 2 ) 2 = 4 - 2. 3.74 - - 6.53 17 17-14 = 1 1 1 ) 2 = 1 3.74 0.273. Describe the distribution of sample means (shape and standard error) for samples of n = 50 selected from a population with a standard deviation of o = 20. (Round to 2 decimal places). Explain your answers. a. Shape (explain your answer): 50 25 35 20 b. Standard error