Question

Fill in the blanks from the alternatives given in the brackets-

1) __________ data is collected by someone else and used by the investigator.
(Primary, Secondary, Official, Confidential)

2) In case of______ method, each and every unit of population is studied.
(Sample, Census, Lottery, Random)

3) Random Sampling is a sampling by________
(Chance, Choice, Purpose, Quota)

4) The extreme values of the classes are called_______
(Class-mark, tally marks, class-limit, class-frequency)

Answer 1

1. Secondary data is collected by someone else and used by the investigator.
Explanation
The secondary data is the data that is not directly collected by the investigator rather it had been collected by someone else in the past and is later used by the investigator.

2. In case of census method, each and every unit of population is studied.
Explanation
In the census method of survey, every unit of a population is taken into account. That is, the information is collected from every single element of the population.

3. Random Sampling is a sampling by chance.
Explanation
In random sampling, the items in the sample are chosen at random. In other words, the selection of items in the sample is purely based on chance or on the concept of probability. So, all the components get an equal chance to get selected in the sample.

4. The extreme values of the classes are called class-limit.
Explanation
The extreme values of classes are called class-limits. Every class limit has a minimum value known as lower limit and maximum value known as upper limit.