Applications of z test (two-tailed)
Commuting distances are obtained for a random sample of 169 workers form this area, and the mean distance is found to be 15.5 miles. Test the null hypothesis at the 0.05 level of significance. Review of the assumptions for z test: ( 1. The sample size is large enough (>25) to satisfy the requirement of the central limit theorem. ( 2. ................
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