without expalntion

Question1

What is often used to investigate the relationship between the variables?

		Flow diagram
		Bar chart
		Pie chart
		Scatter diagram or scatter plot

Question 2

Which among the following is true for dummy variable in regression analysis?

		Binary (or dummy or indicator) variables are special variables created for qualitative data
		A dummy variable is assigned a value of 1 if a particular condition is met and a value of 0 otherwise.
		The number of dummy variables must equal one less than the number of categories of the qualitative variable.
		All the given answers.