Using the z-value -2.1, what is the probability of finding a value for the sample mean less than 30.99? Round your answer to four decimal places. Using the z-value calculated in Chapter 7 Question 1,...

Using the z-value -2.1, what is the probability of finding a value for the sample mean less than 30.99? Round your answer to four decimal places.

Extracted text: Using the z-value calculated in Chapter 7 Question 1, what is the probability of finding a value for the sample mean less than 30.99? Round your answer to four decimal places.