-2.674 2.074 Step There is enough. evidence that the w 2 tape of metal rods is EXAMPLE 5 different . * The following data are the number of sales made by a sample of nine salesperson in Johor and sample of six salespersons in Kedah over a certain fixed period of time. Johor 59 54 48 Kedah 50 70 62 52 70 56 Assume that the two population variances are not equal, test the mean sales in Johor is less than the mean sales in Kedah at 5% significance level. a9: Mo search ISUS