Recovery Treatment Yes No Total Remdesivir 177 45 222 Placebo 128 71 199 Total 305 116 421 (2pts) What is the explanatory variable? 421 Patients The response variable? 305 Patients (2pts) We will run a Chi-squared test for independence. State the null and alternative hypotheses. > (4pts) Use StatCrunch the run the Chi-squared test. Be sure to include the expected frequencies and the odds ratio. Insert an image of the output. (3pts) State the value of the test statistic, the P-value, and the Odds ratio. (2pts) If a=0.01 , what should the conclusion of our test be? > (3pts) Interpret the odds ratio. Be sure to mention the strength of the association. 2. The contingency table below cross-lists a student's year in school and their math grade for a particular high school. Grade Year F D C B A Total Freshman 207 108 100 133 56 604 Sophomore 159 210 157 176 110 812 Junior 103 100 206 206 155 770 Senior 53 56 160 210 208 687 Tota 522 474 623 725 529 2873 (2pts) What is the explanatory variable? The response variable? > (2pts) We will run a Chi-squared test for independence. State the null and alternative hypotheses. > (4pts) Use StatCrunch the run the Chi-squared test. Be sure to include the expected frequencies. Insert an image of the output. > (2pts) State the value of the test statistic & the degrees of freedom. > (2pts) If