Tamil Nadu Board Solutions for Chapter: Statistics, Exercise 2: Exercise

An example of a primary data is _____ .

An example of a secondary data is _____.

The tally marks for number $7$ in standard form is _____.

The table shows the number of calls recorded by a Fire Service Station in one year.

$\begin{array}{|lcc|}\hline \text{ Types of Calls }& \text{ Tally Marks }& \text{ Frequency }\\ \text{ Building Fires }& \cancel{\left|\right|\left|\right|} |& \\ \text{ Other Fires }& \cancel{\left|\right|\left|\right|} \cancel{\left|\right|\left|\right|} |& \\ \text{ Hazardous Materials }& & 7\\ \text{ Rescues }& & 4\\ \text{ False Alarms }& \cancel{\left|\right|\left|\right|} \left|\right|& \\ \text{ Total }& & \\ \hline\end{array}$

Complete the table and answer the following question.

How many calls were recorded as false alarm?

The tally marks for the number $7$ in standard form is

The tally marks $\cancel{\left|\right|\left|\right|} \left|\right|\left|\right|$ represent the number count?

The plural form of 'datum' is

Thamarai is fond of reading books. The number of pages read by her on each day during the last $40$ days are given below. Make a Tally Marks table.

$$\begin{gathered} 1 3 5 6 6 3 5 4 1 6 2 5 3 4 1 6 6 5 5 1 \\ 1 2 3 2 5 2 4 1 6 2 5 5 6 5 5 3 5 2 5 1 \end{gathered}$$