The local school board has instituted a book rewards program intended to encourage third graders to read more, thereby increasing their scores on a standardized vocabulary test. Nationally, the average score on this exam among third graders is 98. A random sample of 223 local third graders participating in the program scored an average of 104 on the test with a standard deviation of 13. Conduct a significance test with a=.05 to answer the research question: Is the program working to significantly increase local third graders' vocabulary scores? What is the probability that your obtained score is wrong, assuming the null hypothesis is true? Do you reject the null or fail to reject the null based on the program working?

The local school board has instituted a book rewards program intended to encourage third graders to read more, thereby increasing their scores on a standardized vocabulary test. Nationally, the...

What is the probability that your obtained score is wrong, assuming the null hypothesis is true?

Do you reject the null or fail to reject the null based on the program working?

Jun 08, 2022