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Percentages of on-time arrivals for major U.S. airlines range

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The percentages of on-time arrivals for major U.S. airlines range from 68.6 to 91.1. Two regional airlines were surveyed with the following results. At a= 0.01 is there a difference in proportions?

Airline A Airline B
No. of flights 300 250
No. of on-time flights 213 185

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The expert determines the percentages of on-time arrivals for major U.S. airline ranges.

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The null hypothesis: there is no difference in proportions. In mathematical terms, p1=p2
The alternative hypothesis: there is significant difference in proportions. In ...

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