An experiment in teaching research methods in psychology was recently conducted at a large university. One section was taught by the traditional lecture-lab method, a second was taught by an all-lab/demonstration approach with no lectures, and a third was taught entirely by a series of videotaped lectures and demonstrations that the students were free to view at any time and as often as they wished. Students were randomly assigned to each of the three sections, and, at the end of the semester, random samples of final exam scores were collected from each section. Test whether teaching method affected student performance on the final exam. Use the .05 significance level. What is the correct decision and conclusion? Lecture/Lab All-Lab/Demo Videotaped M1=70.67 M2=72.33 M3=65.33 S1=2.95 S2=3.29 S3=1.20 N1=5 N2=5 N3=5 Group of answer choices Decision: Do not reject the null hypothesis; Conclusion: The mean final exam scores for the three teaching methods are different Decision: Reject the null hypothesis; Conclusion: The mean final exam score for the Videotaped method is lower than the mean final exam scores for the Lecture/Lab method and the All-Lab/Demo method Decision: Do not reject the null hypothesis; Conclusion: The mean final exam scores for the three teaching methods are not different Decision: Reject the null hypothesis; Conclusion: The mean final exam scores for the three teaching methods are different
Contingency Table
A contingency table can be defined as the visual representation of the relationship between two or more categorical variables that can be evaluated and registered. It is a categorical version of the scatterplot, which is used to investigate the linear relationship between two variables. A contingency table is indeed a type of frequency distribution table that displays two variables at the same time.
Binomial Distribution
Binomial is an algebraic expression of the sum or the difference of two terms. Before knowing about binomial distribution, we must know about the binomial theorem.
An experiment in teaching research methods in psychology was recently conducted at a large university. One section was taught by the traditional lecture-lab method, a second was taught by an all-lab/demonstration approach with no lectures, and a third was taught entirely by a series of videotaped lectures and demonstrations that the students were free to view at any time and as often as they wished. Students were randomly assigned to each of the three sections, and, at the end of the semester, random samples of final exam scores were collected from each section. Test whether teaching method affected student performance on the final exam. Use the .05 significance level.
What is the correct decision and conclusion?
| Lecture/Lab | All-Lab/Demo | Videotaped |
| M1=70.67 | M2=72.33 | M3=65.33 |
| S1=2.95 | S2=3.29 | S3=1.20 |
| N1=5 | N2=5 | N3=5 |
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