The Japan Automobile Manufacturer's Association provides data on exported vehicles in Japan's Motor Vehicle Statistics, Total Exports by Year. In 2005, cars, trucks, and buses constituted 86.4%, 12.1%, and 1.5% of vehicle exports, respectively. This year, a simple random sample of 750 vehicle exports yielded 665 cars, 71 trucks, and 14 buses.

a. At the 5% significance level, do the data provide sufficient evidence to conclude that this year's distribution for exported vehicles differs from the 2005 distribution?
b. Repeat part (a) at the 10% significance level.

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Games Probability Actual 0.1250 20 0.2500 23 0.3125 22 0.3125 35