Question: Assume that the data collected has a normal distribution and we know . Find the critical z value(s) used to test a null hypothesis about

Assume that the data collected has a normal distribution and we know . Find the critical z value(s) used to test a null hypothesis about the mean where = 0.03 for a left-tailed test. If you use a calculator please tell me how you typed it in as I'm trying to learn thank you

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