7.38 Teaching descriptive statistics. A study compared five different methods for teaching descriptive statistics. The five methods were traditional lecture and discussion, programmed textbook instruction, programmed text with lectures, computer instruction, and computer instruction with lectures. 45 students were randomly assigned, 9 to each method. After completing the course, students took a 1-hour exam. (a) What are the hypotheses for evaluating if the average test scores are different for the different teaching methods? (b) What are the degrees of freedom associated with the F-test for evaluating these hypotheses? (c) Suppose the p-value for this test is 0.0168. What is the conclusion?

7.38 Teaching descriptive statistics. A study compared five different methods for teaching descriptive statistics. The five methods were traditional lecture and discussion, programmed textbook instruction, programmed text with lectures, computer instruction, and computer instruction with lectures. 45 students were randomly assigned, 9 to each method. After completing the course, students took a 1-hour exam. (a) What are the hypotheses for evaluating if the average test scores are different for the different teaching methods? (b) What are the degrees of freedom associated with the F-test for evaluating these hypotheses? (c) Suppose the p-value for this test is 0.0168. What is the conclusion?

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

See similar textbooks

Similar questions

Null? test statistics? p value? conclusion for hypothesis
True or false?
Select all the studies where the explanatory variable is measured at the same time as the outcome variable. Clinical Trial Case-Control Cross-Sectional Cohort A survey where a large portion of those under the age of 25 in the sample did not answer the questions about drug use is an example of what type of bias? Selection Measurement Respone Non-Response When the population of interest is everyone in a high school, but only people who attend the sporting events are recruited into the sample, this is an example of what kind of bias? Selection Measurement Respone Non-Response
Base on the relationship between the obtained value and the critical value, what decision would you make about the null hypothesis? Reject the null, the critical value exceeds the obtained value Accept the null, the critical value exceeds the obtained value Reject the null, the obtained value exceeds the critical value Accept the null, the obtained value exceeds the critical value
COLLAPSE What are p-values? Why are they important? What does a p-value tell us? Why are p-values often misunderstood and misused? When do we reject or fail to reject the Null Hypothesis based on p-values?
ANOVA Tests and Independent & Dependent Variables COLLAPSE How are the treatments in an ANOVA test similar to independent and dependent variables? How are they different?
Test the claim that the proportion of men who own cats is smaller than 20% at the 0.05 significance level. Based on a sample of 200 people, 11% owned cats The test statistic is: (to 2 decimals) The critical value is: (to 2 decimals)