(i). A grouped frequency distribution table of class size 2 has to be constructed. The class intervals will be 84 − 86, 86 − 88, and 88 − 90…

By observing the data given above, the required table can be constructed as follows.

(ii). It can be observed that the relative humidity is high. Therefore, the data is about a month of rainy season.

(iii). Range of data = Maximum value − Minimum value = 99.2 − 84.9 = 14.3