Cumulative frequency table is given below. Which type of cumulative frequency is given. Try to build the frequencies of respective class intervals.

The marks obtained by 35 students in a test in statistics (out of 50) are as below.

35 1 15 35 45 23 31 40 21 13 15

20 47 48 42 34 43 45 33 37 11 13

27 18 12 37 39 38 16 13 18 5 41

47 43

Construct a frequency distribution table with equal class intervals, one of them being 10-20 (20 is not included).

Construct the class boundaries of the following frequency distribution table. Also construct less than cumulative and greater than cumulative frequency tables.

Number of readers in a library are given below. Write the frequency of respective classes. Also write the less than cumulative frequency table.

The following table gives the distribution of 45 students across the different levels of Intelligent Quotient. Draw the histogram for the data.