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 class marks of a distribution are 12, 18, 24, 30. Find the class interval.

The mean of the following distribution is 52 and the frequency of class interval 30-40 is f. Find f.

If the upper and the lower limits of a class interval are 16 and 10, the class-interval is ...

For the following distribution the modal class is

The class marks of a distribution are 26,31,36,41,46,51,56,61,66,71. Find the true class limits.

The class marks of a distribution are 26,31,36,41,46,51,56,61,66,71. Find the true class limits.

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.

The class marks of a distribution are 62, 67, 72, 77, 82 and 87. Find the class-size and class-limits

The following data gives the weights of 30 persons (in kg) 70.0,69.4,49.4,64.5,59.4,72.4,47.5,48.8,62.3,64.2,66.8,70.3,71.3,56.3,52.7,66.6,59.9,64.7,44.6,60.3,50.3,54.3,62.3,56.3,45.0,45.7,49.8,60.5,67.8,50.1, (i) Construct a frequency distribution such that the last class is 72-76. (ii) State the upper class limits of last three class intervals. (iii) State the maximum weight that can be included in the fourth class interval. (iv) State the class mark of each of the classes. (v) Find the range of the given weights. (vi) If 60kg is the weight of a person then in which class interval, it will be taken.

Write the comulative frequency of class interval 30-40