watch the video and answer question

https://youtu.be/aJe33c6k_t0

Question 1 1 pts First, a Chi-square test of independence is used when we have a categorical explanatory variable and a categorical response variable. The null hypothesis is that there is no relationship between the 2 categorical variables, they are independent. And the alternate hypothesis is that there is a relationship between the 2 categorical variables, and they are not independent. The chi square statistic is calculated considering both the observed and 0 expected counts 0 unexpected counts 0 unexpected wedding guests 0 no one expects the Spanish Inquisition EVENT A EVENT 8 Gender Yes No Total Male 77 404 481 P ( A AND 8 ) = P(A) * P(B ) Female 16 122 138 Total 93 526 619 P( DRUNK AND MALE ) = P(DRUNK) * P(MALE) P( DRUNK ) = 93/619 P(MALE) = 481/619 P( DRUNK AND MALE) = (93/619) * (481/619) 619 * P(drunk and male) = 619 93 481 93*481 619 619 619 P(A and B) [ Choose ] Table Total*(Column Total/Table Total)*(Row Total/Table Total) 619*P(drunk and male) P (drunk and male) (93/619)*(481/619) P(A) *P(B) Expected Count [ Choose ] Expected Count of Drunk Males [ Choose ]D Question 3 1 pts (77- 72.3) (404- 408.7) (122- 117.3) 72.3 408.7 117.3 =.306+.054+1.067+.188=1.62 Drank Alcohol in the Last 2 Hours Gender (x) es No Total Observed Count Male 77 404 72.3 408.7 481 Expected Count Female 16 122 20.7 117.3 138 Total 93 526 619 Scroll for details X Chi-Square Test Statistic [ Choose ] 72.3 77 Observed Male Drunk Drivers 306 1.62 Expected Male Drunk Drivers [ Choose ] Chi-Square Contribution from Male Drunk [ Choose ] Drivers