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The management of a caf wants to be confident that their coffee temperature is consistent through various circumstances such as long pick-up time, added milk,

The management of a caf wants to be confident that their coffee temperature is consistent through various circumstances such as long pick-up time, added milk, etc. To do so, they decided to undertake a statistical process control initiative to determine the consistency of temperature of different types of coffee. Ten random latt samples were selected every hour during a seven-hour shift, and the temperature of each cup of coffee was recorded. The following data was collected; the temperature is measured in degrees Celsius.

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116

103

116

106

124

98

125

114

101

119

109

104

93

124

109

117

117

117

106

96

116

124

125

122

124

125

93

103

124

108

120

119

114

98

117

116

106

114

104

116

93

101

109

103

109

104

109

98

120

124

104

119

114

108

98

104

111

120

108

112

111

100

119

119

103

109

122

103

100

114

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