Customer wait time in second find the Mean and standard deviation of times which method is better

Statsville Credit Union is considering switching from having multiple lines (one for each teller) to having sin using each method. Multiple Lines 252 324 348 372 402 462 462 510 558 600 Single 390 Line 396 402 408 426 438 444 462 462 462 Find the mean and standard deviation of the times using each method. Based on these data, which meth A. Multiple Lines: x = 421 seconds and s = 53.4 seconds Single Line: x = 437 seconds and s = 53.4 seconds The multiple lines method appears to be better because it has a lower average wait time. OB. Multiple Lines: x - 429 seconds and s = 109.3 seconds Single Line: x = 429 seconds and s = 28.6 seconds The multiple lines method appears to be better because it has a higher standard deviation of O C. Multiple Lines: x = 429 seconds and s = 109.3 seconds Single Line: x = 429 seconds and s = 28.6 seconds The single line method appears to be better because it has a lower standard deviation of cu OD. Multiple Lines: x = 462 seconds and s = 110.4 seconds Single Line: x = 462 seconds and s = 31.7 seconds The single line method appears to be better because it has a lower standard deviation of c