The weight of crabs is normally distributed with mean 28.5 ounces and standard deviation of 3 ounces. A new breeder claims that he can breed crabs yielding a mean weight of more than 28 ounces. A random sample of 36 crabs from the new breeder had a mean weight of 29.2 ounces. A researcher wants to determine if the breeder's claim is true at a = 5%.

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