Useful tips for everyday
What is the largest sample size? A good maximum sample size is usually around 10% of the population, as long as this does not exceed…
How do you interpret linearity in a scatter plot? A linear relationship between X and Y exists when the pattern of X– and Y-values resembles…
How do you test if a hypothesis is true? Hypothesis testing is used to assess the plausibility of a hypothesis by using sample data. The…
What questions should I ask in a market research questionnaire? Market research questions to ask clients or customers include: How likely are you to recommend…
Is confidence interval the same as error? So the standard error of a mean provides a statement of probability about the difference between the mean…
Which of the following is true about handshaking lemma? The Handshaking Lemma In any graph the sum of the vertex degrees is equal to twice…
Why standard deviation is called standard? Its significance lies in the fact that it is free from those defects which afflicted earlier methods and satisfies…
What is cluster experimental design? A cluster randomised controlled trial is a type of randomised controlled trial in which groups of subjects (as opposed to…
What is crosswise regression? The Crosswise Model (CM) has been proposed as a method to reduce effects of social desirability in sensitive questions. This design…
Why is there no Multicollinearity assumption? No Multicollinearity—Multiple regression assumes that the independent variables are not highly correlated with each other. This assumption is tested…