all the question in the picture

1. Let's say we have two groups, group 1 = 9- to 15-year-old girls & group 2 = 16- to 22-year- old girls, who are given questionnaires regarding their desire to see a "boy band" in concert. The questionnaire was rated on a scale of 1 = no desire to see the boy band to 10 = extremely high desire to see the boy band. Group 1 had a mean of *1 = 7.5 and Group 2 had a mean of X, = 3.7. The sample size for each group was M = 10 and N2 = 10. Standard deviations for group 1 and group 2 are $1 = 1.5 and $2 = 1.2, respectively. We want to know if the sample means differ from one another and decide to do an independent-samples t test. Please compute the observed t statistic by hand. Report the t statistic using three decimal places (more technically, round to the thousandths). For full credit, be sure to show all of your work. (3 points - 2 points for correct answer and 1 point for showing work) Formula: X X2 find = (N] -1)$7 + (N2-1)s; 1 1 Ni+ N2 -2 ILN N2] 2. What are the degrees of freedom for the independent-samples : test computed in question 1? For full credit, be sure to show all of your work. (1 point for correct answer) Formula: find degrees of freedom = (N1 + N2) - 2