Food preparation in a restaurant must be performed carefully to prevent food spoilage or undercooked or overcooked food.oven temperature is a critical factor.one concerned chef monitors oven temperature hourly,he wants to be 90 percent confident that the average oven temperature is 350 degrees. from his 50 samples,he has calculated an average oven temperature of 351 degrees.the oven manufacturer claims that the population standard deviation is two degrees,calculate the confidence interval