Question: The monthly aircraft sales data throughout last year can be seen in the table below. Check and see if there is normality in the data.

The monthly aircraft sales data throughout last year can be seen in the table below. Check and see if there is normality in the data. Consider a ¼5%.

Jan. Feb. Mar. Apr. May Jun. Jul. Aug. Sept. Oct. Nov. Dec.

Jan. Feb. Mar. Apr. May Jun. Jul. Aug. Sept. Oct. Nov. Dec. 48 52 50 49 47 50 51 54 39 56 52 55

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