A manufacturer of fertilizer is stressing over the fall in sales that they are experiencing for the past 3 months. They have a quality control policy that requires them to destroy any bag of fertilizer that are more than 2 standard deviations. They are suspecting that inconsistency in quality is the reason behind the decline in sales. A sample of 15 bags was taken and their variance was found to be 10. Test the manufacturer's suspicion at 10% significance level.