From the 4.2 table, summarize the results of the data analysis, the measurement of satisfaction on the invention of the smart mailbox. The total number of two sides with an average of 4.63 and the standard deviation equals 0.51, the highest level of satisfaction. Side-by-side separation of products The total average is 4.60 and the standard deviation equals 0.54 and the second side of use. With a total average of 4.66 and standard deviation equal to 0.49, the level of satisfaction is the most degree, respectively.
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