Additional step

Serial#

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Mean

Stdv

basis

67

194

187

335

190

117

156

96

60

39

103

59

134

84

11011

49

242

186

317

159

138

152

104

49

69

63

69

134

84

32415

48

174

213

283

178

150

241

66

38

73

76

59

134

84

18264

107

252

186

270

95

47

162

132

47

0

95

204

134

84