Hi does anyone understand this in statistics?

()Grades for David Mercado B X _ Classes X Classwork for 4 DeleonPardi X K David Mercadobeltran - Assi X Course Hero X + X C web.kamihq.com/web/viewer.html?state=%7B"ids"%3A%5B"1iS3Zb02RbOuTyuGK507p2Bly69WjH415"50%2C"authuser"%3A"1"%2C"fro... Kami Student Upgrade 1 9 4 DeLeonPard.. . David Mercadobeltran - Assignment 21 - Matched pairs 1 sample t-test - + 61% * 6 & & Turn In Jam ? DM Assignment #21- Matched Pairs - 1 Sample t-test and t-interval Researchers designed an experiment to study the effects of caffeine withdrawal. They FL recruited 30 volunteers who were diagnosed as being caffeine dependent to be the subjects of the study. Each subject was barred from coffee, cola, or any other caffeinated substance for the duration of the experiment. During one 2-day period, subjects took capsules containing their normal caffeine intake. During another 2-day period, they took placebo capsules. The order in which the subjects took the caffeine and placebo pill was randomized. At the end of each 2-day period, a test for depression was given to all 30 subjects. Researchers wanted to know whether being deprived of caffeine would lead to an increase in depression. Subject Depression Depression ... (Cuffwins) a. Carry out a test to investigate the researchers' question 1 5 16 at a significance level of 2%. 2 23 3 4 5 T 14 4 3 7 5 14 24 6 3 15 18 OOO Page 1 / 2 - O 8:58 PM O 4/10/2021()Grades for David Mercado Belt X 2 Classwork for 4 DeleonPardini, X K David Mercadobeltran - Assign X * Course Hero X + X C web.kamihq.com/web/viewer.html?state=%7B"ids"%3A%5B"1iS3Zb02RbOuTyuGK5D7p2Bly69WjH415"%50%2C"authuser"%3A"1"%2C"fro... [ Kami Student Upgrade 9 2 4 DeLeonPard. . David Mercadobeltran - Assignment 21 - Matched pairs 1 sample t-test - + 61% * 6 & & Turn In ? DM b. Construct the corresponding confidence interval to determine the mean difference in depression scores on the depression test. FL ... T 14 OOO Page 2 / 2 - O 8:59 PM O 4/10/2021