Question: Assume that the data has a normal distribution and the number of observations is greater than 50. Find the critical z value used to test

Assume that the data has a normal distribution and the number of observations is greater than 50. Find the critical z value used to test a null hypothesis.
a = 0.05 for a left-tailed test.

Select one:

a. ±1.645

b. ±1.96

c. -1.645

d. -1.96

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