Page 1 - Home Assignment-1 -Ch.14 Statistics(Itroduction,Presentation of data)
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SAI International Residential School
                                                           Class –IX


                                                         Mathematics


                Chapter-14: statistics

               Home Assignment-1


               1.     Find the range of data 70, 65, 71, 36, 55, 61, 62, 41, 40, 39, 35.

               2.     If the class marks in a frequency distribution are 19.5, 26.5, 33.5, 40.5, then the
                      class corresponding to the class mark 33.5 is:_________.

               3.     The consecutive class marks of a data having continuous class intervals having
                      class width as 5, have a gap of ________ between them.

               4.     The number of runs scored by a cricket player in 10 innings are as follows: 26, 35,
                      95, 48, 82, 107, 53, 0, 71, 15. How many times did he score more than 50 runs?

               5.     The following data gives the amount of manure (in thousand tones) manufactured
                      by a company during some years: Year 1992 1993 1994 1995 1996 1997 Manure
                      (in thousand tones) 15 35 45 30 40 20 Choose the correct alternative: The
                      consecutive years during which there was maximum decrease in manure
                      production are___________.

               6.     If class mark and class size of the class interval are 25 and 10 respectively ,then
                      the class interval is________.

               7.     The width of each of five continuous classes in a frequency distribution is 5 and
                      the lower class limit of the lowest class limit of the lowest class is 10.
                       The upper class limit of the highest class Is_________.

               8.     What are the types of graphs used for the representation of data?
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