Question: Your company buys small rubber hoses that are used in a certain fitting in the motor your company manufacturers. The management does not accept variance greater than 4 in rubber hose diameter. Using the data below, find the 95% confidence interval for the variance and decide (explain) whether the rubber hoses shipment will be accepted or rejected.

Sample diameters in mm (millimeters):

118 119 118 120 123 122 120 121 129 117 117 118 121 123 122