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Votes
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name Punditsdkoslkdosdkoskdo

Find the hypothesis for the problem

"Durable press" cotton fabrics are treated to improve their recovery from wrinkles after washing. "Wrinkle recovery angle" measures how well a fabric recovers from wrinkles. Higher is better. Here are data on the wrinkle recovery angle (in degrees) for a random sample of fabric specimens. Assume the populations are approximately normally distributed with unequal variances. A manufacturer believes that the mean wrinkle recovery angle for Hylite is better. A random sample of 25 Hylite (group 1) and 20 Permafresh (group 2) were measured. Test the claim using a 10% level of significance.

Hylite

Permafresh

141

124

140

145

138

136

138

117

138

133

141

139

141

105

132

127

141

137

135

139

146

165

142

131

139

137

131

147

133

148

146

142

139

116

146

148

137

133

142

136

137

 

134

 

137

 

138

 

143

 

Find the p-value. Round answer to 4 decimal places. Make sure you put the 0 in front of the decimal.

p-value