The number of accidents for seven days in a locality are given below:No. of accidents | $0$ | $1$ | $2$ | $3$ | $4$ | $5$ | $6$Frequency | $15$ | $25$ | $30$ | $9$ | $3$ | $2$ | $1$What is the number of cases when $3$ or less accidents occurred?

Divided bar chart is considered for

$Data are said to be ______ if the investigator himself is responsible for the collection of the data.$

A suitable graph for representing the portioning of total into sub parts in statistics is:

The average of salaries in a factory is $47,000$. The statement that the average salary $47,000$ is

$Statistics cannot deal with ______ data.$

$Census reports are used as a source of ______ data.$