subject HR

Question 16 1 pts The data below show the self-reported nervousness scores (on a scale from 1-10, higher values implying higher nervousness) before and directly after a university exam for a sample of n = 28 students. The researchers tested whether the decrease in nervousness was larger than 3.50. What can the researchers conclude? Before the exam After the exam Difference A M 7.50 3.45 4.05 82 6.40 3.98 4.52 O The decrease in nervousness is significantly larger than 3.50 at a = .05 O The t-statistic of the statistical test is t = 0.12 O The effect size of the difference is d = 0.85 O The decrease in nervousness is not significantly larger than 3.50 a = .05 1 nts D Question 15 1 pts A research team has collected data about students' sports preferences (alone vs with a friend) and whether they are local or international students. The data are presented below. Which of the statements below is correct? Local student Intern. student Sport alone 25 30 Sport with a friend 50 30 O x2(1) = 2.52 O x2(2) = 3.84 O x2(2) = 2.52 O x?(1) = 3.84 Question 16 1 pts C