WILL MARK BRAINLIEST!!!

The grades of a science test are normally distributed. Thanh finds that his grade on the test has a z-score of –2.5. Which of the following statements must be true?

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A. Thanh’s grade is 2.5 standard deviations below the mean of the test grades.

The grades of a science test are normally distributed. Thanh finds that his grade on the test has a z-score of –2.5. Which of the following statements must be true?

PLEASE SHOW WORK!

A. Thanh’s grade is 2.5 standard deviations below the mean of the test grades.

Answer

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Answer is From all those aforementioned, the true statement is: Thanh’s grade is 2.5 standard deviations below the mean of the test grades.

explanation

The z scores are standard deviations. If, for example, a tool returns a z score of +2.5, it means that the result is a standard deviation of 2.5. Very high or very low (negative) z scores associated

with very low p values are at the ends of the normal distribution.