Subject : Basic Statistics 15. A math lesson is given to 12 students with the usual teaching method. Another class consi

[answerhappygod]

Subject : Basic Statistics
15. A math lesson is given to 12 students with the usualteaching method. Another class consisting of 10 students is giventhe same lesson but with a method that uses programmed materials.At the end of the semester students of both classes were given thesame exam. The first class achieved an average score of 85 with astandard deviation of 4, while the class using programmed materialsobtained an average score of 81 with a standard deviation of 5.With a significance level of 0.1, test the hypothesis that there isno difference between the two teaching methods. Assume that the twopopulations are normally distributed with the same variance. Theconclusion is …
a. There is no right conclusion
b. here is no difference between the ordinary teaching methodand the teaching method with programmed materials.
c. There is a difference between the ordinary teaching methodand the teaching method with programmed materials.
d. Ordinary methods are no better than methods with programmedmaterials.