Heating and combustion analyses were performed in order to study the composition of moon rocks.

Heating and combustion analyses were performed in order to study the composition of moon rocks. Recorded here are the determinations of hydrogen (H) and carbon (C) in parts per million (ppm) for 11 specimens.

Hydrogen (ppm)

120

86

90

8

38

20

2.8

66

2.0

20

85

Carbon (ppm)

105

110

99

22

50

65

7.3

74

7.7

45

51

Calculate r. Round your answer to three decimal places.