Question

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

Answer 1

Complete Question

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Answer:

The value is
`z = \pm 1.645`

Explanation:

From the question we are told that

The number of observation is greater than 50 i.e. n > 50

The level of significance is
`\alpha = 0.1`

Generally given that n > 30 then we will make use of the z table

So

From the z table the critical value corresponding to the level of significance level for a two-tailed test is

`z = \pm 1.645`