For each example below, state the null and alternative hypotheses. 1. A light bulb manufacture claims that the mean life of a certain light bulb is 750 hours. The three you purchased only lasted 700 hours.
2. As stated by a company’s shipping department, the number of shipping errors per million shipments is 15. Last month, there were 20 errors per million shipments.
3. The mean price of a certain model of car is $30,000, according to commercials. However, you stop by five different dealerships, and each has the car listed for more than $30,000.
4. A research organization reports that 33% of the residents in Ann Arbor, Michigan are college students. It seems “everyone” who lives there attends the University of Michigan though.
5. The results of a recent study show that the proportion of drivers in the United States who wear seat belts when driving is 84%. This number seems “off” to you, and you think it might be a different proportion.

The price of trade suppose that portugal and sweden both produce rye and wine. portugal's opportunity cost of producing a bottle of wine is 4 bushels of rye while sweden's opportunity cost of producing a bottle of wine is 10 bushels of rye. by comparing the opportunity cost of producing wine in the two countries, you can tell thatportugal/sweden has a comparative advantage in the production of wine.andportugal/sweden has a comparative advantage in the production of rye. suppose that portugal and sweden consider trading wine and rye with each other. portugal can gain from specialization and trade as long as it receives more rye for each bottle of wine it exports to sweden. similarly, sweden can gain from trade as long as it receives more bottles of wine for each bushel of rye it exports to portugal. based on your answer to the last question, which of the following prices of trade (that is, price of wine in terms of rye) would allow both sweden and portugal to gain from trade? a. 1 bushels of rye per bottle of wineb. 8 bushels of rye per bottle of winec. 9 bushels of rye per bottle of wined. 3 bushels of rye per bottle of wine

If you offer up your car as a demonstration that you will pay off your loan to a bank or another financial lending institution, you are using your car as collateral. true false

When used-car dealers signal the quality of a used car with a warranty, a. buyers believe the signal because the cost of a false signal is high b. it is not rational to believe the signal because some used-car dealers are crooked c. the demand for lemons is eliminated d. the price of a lemon rises above the price of a good used car because warranty costs on lemons are greater than warranty costs on good used cars