14. A study done by Dr. S. Friedler, a trained mime and a physician, found evidence that being entertained by live clowns immediately after in-vitro fertilization (IVF) may increase conception rates (Friedler et al, 2011) DOI: 10.1016. Yes, this real study was about whether watching 15 minutes of 'medical clowning' after an embryo transfer or IVF would affect the chance of a successful pregnancy. The 170 women in the study were randomly assigned to either clown or no clowncondition. Please use these data to test whether pregnancy rates were independent of being entertained by a clown after IVF. Show your work and include each step in the hypothesis testing process. Observed data: Pregnant Not Pregnant Clown 31 54 No Clown 12 73 a. State the null and alt hypotheses. b. Find df and critical value for the chi-square test. c. Calculate the expected frequencies and the chi-square test value. Is it significant? d. Report the results in an APA conclusion sentence with test used, variables (IV/DV), decision, and report the stats in APA format - even if not significant