Z - Test Contd.
Z - Test Contd. Q1. Average hourly wage The average hourly wage of a sample of 150 workers in plant 'A' was Rs. 2·87 with a standard deviation of Rs. 1·08 . The average wage of a sample of 200 workers in plant 'B' was Rs. 2·56 with a standard deviation of Rs. 1·28 . (i) Calculate the Z-score for this scenario. (ii) Can an applicant safely assume that the hourly wages paid by plant 'A' are higher than those paid by plant 'B' at a 1% significance level? A. 1.0071, Hourly wages in plant 'A' are not higher than those in plant 'B'. B. 1.0071, Hourly wages in plant 'A' are higher than those in plant 'B'. C. 2.4532, Hourly wages in plant 'A' are not higher than those in plant 'B'. D. 2.4532, Hourly wages in plant 'A' are higher than those in plant 'B'. Correct Answer: 0.0071, Hourly wages in plant ‘A’ a...