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When testing gas pumps for accuracy, fuel-quality enforcement specialists tested pumps and found that 1280 of them were not pumping accurately (within 3.3 oz when 5 gal is pumped), and 5664 pumps were accurate. Use a 0.01 significance level to test the claim of an industry representative that less than 20% of the pumps are inaccurate. Use the P-value method and use the normal distribution as an approximation to the binomial distribution.
Identify the null hypothesis and alternative hypothesis.
The test statistic
The p-valye is?
