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Questionnaire Design
A questionnaire is a primary data collection instrument. It contains a structured set of questions in alignment with the objectives of the study. Hence, “A questionnaire is a systematic and structured instrument of collecting primary qualitative and quantitative data for the objectives of the study from respondents”. A questionnaire generally contains a series of questions that can be answered in writing, verbal, or digital form. The questionnaire captures clear information w
Dr. Bhupender Kumar Som
Apr 43 min read


Experiment Design
Introduction For every cause, there is an effect. The two variables in this relationship are the causal variable and the effect variable . The causal variable is considered to be independent, and the effect variable is understood to be the dependent variable. Few cause and effect relationships are given below. Scenario Independent Variable (Cause) Dependent Variable (Effect) Sales increase after ad campaign Advertising spend Sales growth Employee productivity rises after tra
Dr. Bhupender Kumar Som
Apr 111 min read


Sampling Theory
Introduction A researcher investigating a problem can either go for a desk research; that majorly depends on secondary data or the...
Dr. Bhupender Kumar Som
Oct 29, 202417 min read


Hypothesis Testing
The process of research typically involves six steps in the particular order. The research starts with a problem, observed or experienced...
Dr. Bhupender Kumar Som
Dec 22, 20225 min read


Statistical Error and Confidence Intervals
Statistical Errors The difference between estimated and true value is known as statistical error. These errors may occur due to variety...
Dr. Bhupender Kumar Som
Dec 22, 20223 min read
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