To calculate a CI for the difference between two population means with known standard deviations, do the following: 1  Determine the confidence level and find the appropriate z*-value. Refer to the above table. 2  Identify. 3  Find the difference, between the sample means. 4  Square. and divide it by n1; square. and divide it by n2.
Investigators are checking this phone line throughout the weekend.â. Violations of the price-gouging law are punishable by civil penalties of up to $10,000 for the first offense and $20,000 for the second and subsequent offenses. Each individual sale of merchandise is considered a separate and distinct event.
But it is true that there is some serious price gouging going on in the HVAC business as far the cost per pound of refrigerant. We have some technicians who do field service on the side and they have been charging people up to $40 per pound which is a little more that 4 times what they paid for it from our Lab supply.