Sample

Rockwell Hardness [HRH]

Individual Reading

Average

Standard Deviation

AA6061 Stock

60.5

60

0.3

60.0

59.5

60.0

60.0

60.0

Coupon 1

92.5

93.9

0.9

94.0

95.0

94.0

94.5

93.5

Coupon 2

56.0

57.9

1.2

57.0

59.0

58.5

59.0

58.0

Coupon 3

87.0

86.5

0.8

87.0

85.0

87.0

87.0

86.0