auto racing a pit stop is where a racing vehicle stops for new tires, fuel, repairs and othe mechanical adjustments. the efficiency of a pit crew that makes these adjustments can affect the outcome of a race. a pit crew claims that its mean pit stop time  for 4 ne tires and fuel is less than 13 second. a random sample of 32 pit stop times has a sample mean of 12.9 seconds. State the null and alternative hypotheses   find the standardized test statistics   find the p-value   if the level of significance is a=0.01 is there enough evidence to support the claim

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