sta404

QUIZ STA404 JUNE 2021 QUESTION 3 (5 marks) Alia is interested to know whether the video of education increases during the MCO last year. She collected the data from the youtube channel by counting the number of videos uploaded four months before and four months after the MCO 1.0 was announced. The SPSS output below shows the result of the analysis. Paired Differences 90% Confidence Interval of the Std. Std. Error Difference Sig. (2- Mean Deviation Mean Lower Upper df tailed) Pair Number of -14.92857 X 6.84115 -26.58103 -3.27611 -2.182 27 .038 1 videos (before MCO) - Number of videos (after MCO) a) Find the value of X. (2 marks) b) Find the 90% confident interval for the mean difference. What is the conclusion