Bantu jawab teman-teman

Bantu jawab teman-teman

9. 4, 5, 6, 6, 6, 7, 8( n = 7 )

$x = frac{4 + 5 + 6 + 6 + 6 + 7 + 8}{7} \ = frac{42}{7} = 6$

| 4 – 6 | = |-2| = 2 | 7 – 6 | = 1

| 5 – 6 | = |-1| = 1 | 8 – 6 | = 2

| 6 – 6 | = |0| = 0

$sr = frac{2 + 1 + 3(0) + 1 + 2}{7} \ = frac{6}{7}$

SR = 0,857 = 0,86( C. )

10. 2, 3, 4, 5, 6

$x = frac{2 + 3 + 4 + 5 + 6}{5} \ = frac{20}{5} = 4$

( 2 – 4 ) = (-2)² = 4 ( 5 – 4 )² = 1² = 1

( 3 – 4 )² = (-1)² = 1 ( 6 – 4 )² = 2² = 4

( 4 – 4 )² = 0² = 0

Standar Deviasi(SD) = Simpangan Baku(SB)

$sb = sqrt{ frac{4 + 1 + 0 + 1 + 4}{5} } \ = sqrt{ frac{10}{5} } \ = sqrt{2} (a.)$

11. 5, 6, 7, 7, 8, 9

$x = frac{5 + 6 + 7 + 7 + 8 + 9}{6} \ = frac{42}{6} = 7$

( 5 – 7 )² = (-2)² = 4 ( 8 – 7 )² = 1² = 1

( 6 – 7 )² = (-1)² = 1 ( 9 – 7 )² = 2² = 4

( 7 – 7 )² = 0² = 0

$sb = frac{4 + 1 + 2(0) + 1 + 4}{6} \ = sqrt{ frac{10}{6} }$

σ² = ( √10/6 )² = 10/6( A. )