Question
Construct a frequency table with equal class intervals from the following data on the monthly wages (in rupees) of $28$ labourers working in a factory, taking one of the class intervals as $210-230 (230$ not included$): 220, 268, 258, 242, 210, 268, 272, 242, 311, 290, 300, 320, 319, 304, 302, 318, 306, 292, 254, 278, 210, 240, 280, 316, 306, 215, 256, 236.$
