Find the class mark of the class interval 45 - 50.

Q. Find the class mark of class interval $50-60.$

Q. If the class intervals of a frequency distribution be $16-25,26-35,36-45,46-55$, then determine
(a) the class limits and class boundaries of the class $36-45$
(b) the class size and the class mark of the class interval $26-35$
(c) the class intervals when changed into overlapping class interval

Q.

Question 69

If the fifth class interval is 60-65 and fourth class interval is 55-60, then the first class interval is 45-50. ?

Q. (a)The class interval having highest frequency is-
(b)The class-mark of class 50-60 is-
(c)The size of each class intervals is-

Q. Construct a frequency table for the following weights (in gm) of 35 mangoes using the equal class intervals, one of them is 40-50 (45 not included):
30, 40, 45, 32, 43, 50, 55, 62, 70, 70, 61, 62, 53, 52, 50, 42, 35, 37, 53, 55, 65, 70, 73, 74, 45, 46, 58, 59, 60, 62, 74, 34, 35, 70, 68.
(i) What is the class mark of the class interval 40-45?
(ii) What is the range of the above weights?
(iii) How many classes are there?