Question: The Japan Automobile Manufacturer s Association provides data on exported vehicles

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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