Queues A Providence Hospital experiment involves two different waiting line configurations for patients arriving for admission. The waiting times (in seconds) are recorded with a single-line configuration that feeds four stations and another configuration with individual lines at the four stations. Determine whether there is a difference in variation between the two data sets. Which configuration appears to be better?

Single Line 390 396 402 408 426 438 444 462 462 462 Individual Lines 252 324 348 372 402 462 462 510 558 600