The following dataset of ungrouped data have been collected from a sample of measurements of car part sizes from December 2020 (dimensions in mm): 13 22 26 38 36 42 49 50 77 81 98 110 You are required to compare this with four historical datasets which have the following results: August Mean = 51.5 s.d. = 3.5 September 18.5 12.1 October 100.1 13.6 November 54.6 20.8 By finding the mean and standard deviation (s.d.) of the December figures, comment on any trends in the production process