Do students reduce study time in classes where they achieve a higher midterm score? In a...
Do students reduce study time in classes where they achieve a higher midterm score? In a Journal of Economic Education article (Winter 2005), Gregory Krohn and Catherine O'Connor studied student effort and performance in a class over a semester. In an intermediate macroeconomics course, they found that "students respond to higher midterm scores by reducing the number of hours they subsequently allocate to studying for the course." Suppose that a random sample of n = 8 students who performed well...
Research question: Do adult learners and traditional students score differently on the midterm exam? Midterm exam scores were collected from a sample of 200 students. In that sample, 120 identified as adults learners and 80 identified as traditional students. Which of the following statistical procedures can be used to address this research question using these data? Paired (dependent) means t test One sample mean t test Two independent means t test One sample proportion z test
QUESTION 15 - 19. Ten students who were struggling in a 3rd grade reading class were selected to take part in a Reading Is Fun program. Before the program, each student was given a pre-test; four weeks after attending the program students were given a post-test. Use the SPSS output below to study the question, did the Reading Is Fun program significantly increase students' scores? Use a.05 level of significance. Paired Samples Statistics Mean N Std. Deviation Std. Error Mean...
sorry that there is three- I am having a hard time understanding these ones. It is believed that students who begin studying for final exams a week before the test score differently than students who wait until the night before. Suppose you want to test the hypothesis that students who study one week before score different from students who study the night before. A hypothesis test for two independent samples is run based on your data and a p-value is...
siness test before and after the course. The results are given below. Student Exam Score Before the Course Exam Score After the Course 1 630 770 2 690 770 3 910 1,000 4 750 710 5 450 550 6 840 860 7 820 770 8 630 610 9 580 585 (a) Use an appropriate hypothesis test, at 0.01 level of significance, to determine whether there is evidence of a difference between before and after scores of the students. (b) What...
Example 7: CAOS Comparisons (Paired Differences) The CAOS (Comprehensive Assessment of Outcomes in Statistics) exam is an online multiple choice test on concepts covered in a typical introductory statistics course. Students take one version before the start of the course and another version after the course ends. Before and After scores for a possible random sample of 10 students are shown in the table. (An actual random sample of scores are given in Exercise C.68 on page 455 of the...
A group of n - 9 students was selected for a comparative study that involved their Exam 1 scores [variable - X] and their overall course grades [variable Y] Educators intend to draw inferences about the differences D = Y-X) assuming that differences are normally distributed with unknown parameters. The sample summaries are presented below. Summaries Values Average X X-bar]-74.98 | AverageYSample SD [D] [Y-barl-69.70 S = 9.0 Hypothesis Testing At the significance level, α-500, do you have enough evidence...
Suppose a sample of 49 paired differences that have been randomly selected from a normally distributed population of paired differences yields a sample mean d¯ =4.2 of and a sample standard deviation of sd = 7.6. (a) Calculate a 95 percent confidence interval for µd = µ1 – µ2. Can we be 95 percent confident that the difference between µ1 and µ2 is greater than 0? (Round your answers to 2 decimal places.) Confidence interval = [ ? , ?...
Question 5 (1 point) It is believed that students who begin studying for final exams a week before the test score differently than students who wait until the night before. Suppose you want to test the hypothesis that students who study one week before score less than students who study the night before. A hypothesis test for two independent samples is run based on your data and a p-value is calculated to be 2e-04. What is the appropriate conclusion? 1)...
Please help, Thanks! The scores of 8 students on the midterm exam and final exam were as follows. Student Anderson Bailey Cruz DeSana Erickson Francis Gray Harris Midterm 99 92 92 91 84 83 Final 100 82 71 80 85 72 92 88 80 75 Find the value of the (Spearman's) rank correlation coefficient test statistic that would be used to test the claim of no correlation between midterm score and final exam score. Round your answer to 3 places...