(4) 6. Explain in words what a "statistically significant difference" means (13) 7. You work at a company that is working to reduce costs. The area you have been assigned is to reduce the monthly cost of electricity your company is using. Historically the company has spent on average $100,000 per month on electricity. You institute a series of changes to reduce the electricity use (timers on lights, lower wattage lights, higher air temperatures in the building to reduce AC costs, etc.) and find that over a sample of the last 18 months since the changes you implemented went into effect the average monthly cost for electricity was $80,000 per month with a standard deviation of $12,000. a) At the .01 level did your changes statistically significantly reduce the cost of electricity per month? (P- value = 0) b) Based on the results of a) should these changes be permanently implemented? (yes or no is all I want for the answer here) Answer: c) With the results from part a) you go to your boss and ask for a pay raise due to the savings in electrical costs based on your changes to reduce the cost of electricity your company uses. Explain why n statistical terms you deserve the raise