The demand of different shirt sizes, as obtained by a survey, is given below: Size:, 37,38, 39, 40, 41, 42, 43, 44, total No. of Person (wearing it):, 26, 39, 20, 15, 13, 7, 5, 125 Find the modal shirt sizes, as observed from the survey.

The shirt sizes worn by a group of 200 persons, who bought the shirt from a store, are as follows: Shirt size: 37 38 39 40 41 42 43 44 No. of persons: 15 25 39 41 36 17 15 12. Find the modal shirt size worn by the group.

The maximum temperature on 10 days of June, 2002, in Delhi is given below: Date:, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 Max. Temp. (in \ ^0C): , 40.5, 41, 39, 40, 42, 43, 44, 40, 38, 39 Draw a temperature-time graph for the above data.

The marks obtained by 40 students of class IX in an examination are given below: 18, 8, 12, 6, 8, 16, 12, 5, 23, 2, 16, 23, 2, 10, 20, 12, 9, 7, 6, 5, 3, 5, 13, 21, 13, 15, 20, 24, 1, 7, 21, 16, 13, 18, 23, 7, 3, 18, 17, 16 Present the data in the form of a frequency distribution using the same class size, one such class being 15-20 (where 20 is not included)

Prepare a frequency table of the following scores obtained by 50 students in a test: 42, 51, 21, 42, 37, 37, 42, 49, 38, 52 7, 33, 17, 44, 39, 7, 14, 27, 39, 42 42, 62, 37, 39, 67, 51, 53, 53, 59, 41 29, 38, 27, 31, 54, 19, 53, 51, 22, 61 42, 39, 59, 47, 33, 34, 16, 37, 57, 43

Given below are the marks obtained by 24 students in an examination : {:(18 17 16 24 25 19 41 22),(32 42 44 21 43 26 28 40),(29 30 37 27 49 27 34 31):} Taking class intervals 10 - 20, 20 - 30, ............... , 50 - 60, make a frequency table for the above distribution.

100 surnames were randomly picked up from a local telephone directly and the frequency distribution of the number of letters in the English alphabets in the surnames was obtained as follows: Number of letters: 1-4 4-7 7-10 10-13 13-16 16-19 Number surnames 6 30 40 16 4 4 Determine the median number of letters in the surnames. Find the mean number of letters in the surnames. Also, find the modal size of the surnames.

The marks obtained by 40 students of class VIII in an examination are given below: 18,8,12,0,8,16,12,5,23,2,16,23,2,10,20,12,9,7,6,5,3,5, 13,21,13,15,20,24,1,7,21,16,13,18,23,7,3,18,17,16 Present the data in the form of a frequency distribution using the same class size, one such class being 15-20 (where 20 is not included).

A psychologist selected a random sample of 20 students. He grouped them in 10 pairs so that the students in each pair have nearly equal scores in an intelligence test. In each pair, one student was taught by method A and the other by method B and examined after the course. The marks obtained by them after the course are as follows. {:("Pairs","Method A","Method B"),(1,34,38),(2,36,43),(3,28,39),(4,34,45),(5,40,43),(6,30,50),(7,34,52),(8,28,39),(9,32,40),(10,42,42):} Calculate spearman's Rank correlation