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Reasons for considering statistical analysis in conjunction with visual analysis include: )Statistical analysis should never be used in single case research design. Statistical control is needed for extraneous factors in the naturalistic environment. The researcher has limited experience with visual analysis. OA correlation coefficient would enhance the results.When discussing statistics and statistical analysis the term "skewed data" or "skewness" is sometimes used? What does this mean? Provide an example of data that you have seen that is skewed? In terms of statistical analysis what effect does skew have when looking at a statistical distribution?Question 9 (2 points) Which of the following is false? ()a) Our statistical analysis will only show us correlation, not causation (b) We can demonstrate causation using statistical analysis cl We can infer causation by using theory. observation, or experiment design d) We can demonstrate correlation using statistical techniques e) Causal inference requires that we assume our estimate is unbiased5. Why would you choose a randomized group design over a matched group design. Discuss the advantages and disadvantages of both designs. 6. What type of study would require a multiple regression statistical analysis as opposed to a t-test statistical analysis. Give examples of a study that would require each analysis