(1) At significance level α = 0.05, test H_0: p = 0.1 vs. H_1: p ≠ 0.1.

II.1. The recruitment channels for a company are as follows: based on past experience, 50% of applicants learned of the openings through job banks, 10% through social media ads, 30% through employee referrals, and 10% through campus recruiting. The one-year turnover rates (the probability of an employee resigning within a year) are as follows: 10% for those from job banks, 20% for those from social media ads, 5% for those from employee referrals, and 30% for those from campus recruiting. If an employee is still with the company after one year, what is the probability that he (she) originally learned about the recruitment information through a job bank? (7%)

題組內容

(1) At significance level \( \alpha = 0.05 \), test \( H_0: p = 0.1 \) vs. \( H_1: p \neq 0.1 \).

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