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Verified answer
Statistikax = 1/8 (10 + 6 + 5 + 7 + 8 + 7 + 9 + 12)
= 1/8 (64)
= 8
v = (10 - 8)² + (6 - 8)² + (5 - 8)² + (7 - 8)² + (8 - 8)² + (7 - 8)² + (9 - 8)² + (12 - 8)²
= 4 + 4 + 9 + 1 + 0 + 1 + 1 + 16
= 36
Sb = √v
= √36
= 6
Sr = (|10- 8| + |6 - 8| + |5 - 8| + |7 - 8| + |8 - 8| + |7 - 8| + |9 - 8| + |12 - 8|) / 8
= (2 + 2 + 3 + 1 + 0 + 1 + 1 + 4) / 8
= 14 / 8
= 1,75