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Can you help me? Assume that the data has a normal distribution and the number of observations is greater that fifty. Find the critical z

Can you help me?

Assume that the data has a normal distribution and the number of observations is greater that fifty. Find the critical z value used to test a null hypothesis.

a=0.025 for a test of the hypothesis that the mean is greater than or equal to 98

answers:

a. -2.326

b. +-1.645

c. -1.960

d. -1.645

e. 1.960

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