Independent random samples of 40 Yorkshire litters and 50 La…
Independent random samples of 40 Yorkshire litters and 50 Landrace litters are obtained. For Yorkshires, the mean litter size is 9.0 pigs and the standard deviation of litter size is 2.0 pigs. For Landrace, the mean litter size is 8.5 pigs and the standard deviation of litter size is 1.8 pigs. Construct an 80% confidence interval for the difference in population mean litter sizes of Yorkshire and Landrace.