Scenario Data regarding the weights (/bs) of a sample of toddlers who were examined for symptoms related to diabetes are provided in the table. Unfortunately, an employee had spilled coffee on the file and some of the data are missing and were denoted with a question mark (?). Weight Frequency Cumulative X (x-P) (x-x) (lbs) Frequency 40 44 3 3 42 126 ? ? ? 45 -/49 2 47 ? -3.3 10.89 119.79 50 4 54 9 23 468 1.7 2.89 26.01 55 59 7 30 57 399 6.7 44.89 314.23 Ex -? Correct to one decimal place, the standard deviation (lbs) of the sample is equal to