Abusiness major wants to determine whether the variation in advertising costs of hair salons is different from the variation in advertising costs of nail salons. he surveys several businesses and finds the standard deviation in monthly advertising costs is $23 for 12 hair salons, and $43 for 8 nail salons. what is the test value for this hypothesis test? test value: round your answer to two decimal places. at the 0.05 level of significance, what is the critical value? critical value: round your answer to two decimal place

Quick computing currently sells 12 million computer chips each year at a price of $19 per chip. it is about to introduce a new chip, and it forecasts annual sales of 22 million of these improved chips at a price of $24 each. however, demand for the old chip will decrease, and sales of the old chip are expected to fall to 6 million per year. the old chips cost $10 each to manufacture, and the new ones will cost $14 each. what is the proper cash flow to use to evaluate the present value of the introduction of the new chip? (enter your answer in millions.)