Q.48 At the insistence of a government inspector, a new safety device is installed in an assembly-line operation. After the installation of this device, a random sample of 8 days' output gave the following results for numbers of finished components produced: 61 8 660 638 625 571 598 639 582 Management is concerned about the variability of daily output and views any variance above 500 as undesirable. Test, at the 1 0% significance level, the null hypothesis that the population variance for daily output does not exceed 500. Ans: reject if > 12.02 H : G: $500; H : 6: >500; H