guidance class|interaction class

In the given histogram, which class is the median class?

From the following frequency table. Find : (a) The frequency of fifth class interval (b) The upper class limit of third class interval. (c) The lower class limit of second class interval. (d) The class mark of sixth class interval.

Explain the meaning of the following: (i) Class-interval(ii) Class size (iii) Frequency (iv) Class limits (v) True class limits

The class size of a distribution is 25 and the first class-interval is 200-224. There are seven class-intervals. Write the class-intervals. Write the class-marks of each interval.

The mid-value of a class interval is 25 and the class size is 8. The class interval is

Class mark of a particular class is 6.5 and class size is 3, then class interval is:

In Class XI of a certain school, there are 30 students in a Mathematics class and 20 students in Biolog class. Find the number of students which are in Mathematics class or in Biology class in the following cases: (i) Two classes are conducted at the same time. (ii) Two classes are condcuted at different time and 5 students study both the subject

Explain the meaning of the following terms: variate (ii) class-integral (iii) class-size class-mark (v) frequency class limites (vii) true class limits