Show all work please Name ID One group of accounting students used simulation wh
ID: 3045069 • Letter: S
Question
Show all work please
Name ID One group of accounting students used simulation while another group received 8. a tutorial. Scores on the exam were compared. Statistical software was used to do a two-sample test with variances assumed equal, and the information below is the result. The null hypothesis here is that the mean score is the same or higher when using the simulation preparation. The alternative hypothesis is that mean score is higher when using a tutorial. You are to perform the test for an =0.05 level programs to prepare for an exam Sample Tutorial Simulation 209.102.4 Test Statistic: 1.55 p-value: 0.065 d.f.: 38 Pooled Standard Deviation: 2.4505 N Mean St Dev SE Mean 20 10.30 2.50 0.56 0.54 (4)(a)What is your decision about Ho? What is the l reason for your decision (You must use the p-value approach to get credit.) (2)(b)What evidence do you have about the argument presented by the alternative hypothesis? Be specific 9.The table below shows the average number of daily errors by five air traffic controller trainees during the first two weeks on the job. Eventually, a paired t-test will be performed. (You do not have to do the paired t-test for this problem.) Your job is to calculate the basic statistics that serve as input for the paired t-test. Trainee 4 Week 1 Week 2 13 14 (2) (a)Calculate the mean of the five differences. (3)(b) Calculate the standard deviation of the five differences. For both (a) and (b), do your work directly below. When calculating your differences, set this up so that you are subtracting a Week 2 error from its respective Week 1 error. Credit will not be given if detailed work is lacking.Explanation / Answer
#8.
a) As p-value is greater than the significance level of 0.05, we failed to reject the null hypothesis.
b) There is not sufficient evidence to conclude that the mean score is higher when using a tutorial.
#9.
Mean = sum of diff / 5 = 20/5 = 4 (xbar)
std. dev. = sqrt(10/(5-1)) = 1.5811
Week 1 Week 2 Diff 8 3 5 5 2 3 13 9 4 7 5 2 14 8 6