A research center claims that more than \( 25 \% \) of employees in a certain country have changed jobs in the past three years. In a random sample of 260 people from that country, 78 have changed jobs in the past three years: At \( \alpha=0.05 \), is there enough evidence to support the center's claim? Complete parts (a) through (d) below. (b) Find the critical value(s) and identify the rejection region(s). Identify the critical value(s) for this test. \( z_{0}=\square \) (Round to two decimal places as needed. Use a comma to separate answers as needed.) Identify the rejection region(s). Select the correct choice below and fill in the answer box(es) to complete your choice. The rejection region is \( \square<z<\square \). (Round to two decimal places as needed.) B. The rejection regions are \( z<\square \) and \( z>\square \). C. The rejection region is \( z>\square \). D. The rejection region is \( z<\square \). (c) Find the standardized test statistic \( z \).
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