From which of the frequency distributions we can write the raw data again?

In finding the median, which column in the frequency distribution must be in order? Why?

Three coins are tossed 30 times simultaneously. Each time the number of heads occurring was noted down as follows: Prepare a frequency distribution table for the data given above.

Marks of 30 students in mathematics test are given in the adjacent grouped frequency distribution. (i) Into how many groups the data is classified?

The blood group of 36 students of IX class are recorded as follows Represent the data in the form of frequency distribution table. Which is the most common and which is the rarest blood group among these students?

Write mid-values of the following frequency distribution.

Write the formula for finding mean of ungrouped frequency distribution and explain its terms.

In the following grouped frequency distribution table class marks are given. Construct class intervals of the data. (Exclusive class intervals)

Ages of 60 teachers in primary schools of a Mandal are given in the following frequency distribution table. Construct the Frequency polygon and frequency curve for the data without using the histogram. (Use separate graph sheets)