Question: A company has a contract to construct a large solar farm which will inject electrical power into the national electricity grid. The contract allows for

A company has a contract to construct a large

A company has a contract to construct a large solar farm which will inject electrical power into the national electricity grid. The contract allows for adjustments to the contract payment based on the efficiency of the completed installation. The company has bought a small sample of solar panels from a potential supplier and is in the process of testing and evaluating them. A test of the panels energy conversion ratios under standardised conditions gave the following results. Panel No 1 2 3 4 5 Performance 0.207 0.215 0.187 0.223 0.205 0.195 0.214 0.232 0.212 0.189 6 7 8 9 10 (a) What are the 95% confidence limits for this assessment of the average energy conversion ratios of the panels? (b) What is the estimated range of the energy conversion ratios that would include 95% of the panels (c) How many panels would need to be tested to determine the average energy conversion ratios within plus or minus 0.005 with a confidence limit of 95%

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