(Step-by-Step) A scientist claims that the mean diameter of mature Giant Sequoia trees is at least $25.5$ feet. You suspect this claim is incorrect and find
Question: A scientist claims that the mean diameter of mature Giant Sequoia trees is at least $25.5$ feet. You suspect this claim is incorrect and find that a random sample of 45 Giant Sequoias has a mean diameter of $24.3$ feet. Assume the population standard deviation is \(\sigma=2.1\) feet. At the \(\alpha=0.01\) level of significance, what can you conclude about the scientist's claim? Be sure to include the variable that represents this standardized test statistic, AND express your answer to 2 decimal places.
The standardized test statistic for this hypothesis test is _____________________________________.
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