1. In a survey of 703 randomly selected workers, 61% got their jobs through networking (based on data from Taylor Nelson Sofres Research). Use the sample data with a 0.05 significance level to test the claim that most (more than 50%) workers get their jobs through networking. What does the result suggest about the strategy for finding a job after graduation?
Ho: p=0.5
Ha: p>0.5
The test statistic is
"Z=(phat-p)\/ \\sqrt{(p*(1-p)}\/n)\\\\\n\n=(0.61-0.5)\/ \\sqrt{(0.5*0.5}\/703)\\\\\n\n=5.83"
Given a=0.05, the critical value is Z(0.05)=1.645 (from standard normal table)
Since Z=5.83 is larger than 1.645, we reject Ho.
So we can conclude that most workers get their jobs through networking.
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