1) Define Causation and Correlation according to Merriam-Webster?

2) What is the difference between explanatory variable and response variable?

3) Write any three main differences between t-test and z-test.

4) The circumference of a circle is 36 . Contain in that a circle is a smaller circle with area 16. A point is selected at random from inside the larger circle. What is the probability that the point is also in the smaller circle.