question archive After introducing a new teaching curriculum, a teacher is interested in whether the grade distribution in his course is significantly different than it was in previous years
After introducing a new teaching curriculum, a teacher is interested in whether the grade distribution in his course is significantly different than it was in previous years
Subject:StatisticsPrice: Bought3
After introducing a new teaching curriculum, a teacher is interested in whether the grade distribution in his course is significantly different than it was in previous years. The distribution of grades before the introduction of the new curriculum was as follows:
Grade. Percentage
A 15%
B 40%
C 25%
D 15%
F 5%
A random sample of 150 students taken after the introduction of the new curriculum provided the following results:
Grade Observed Frequency
A 30
B 65
C 35
D 15
F 5
Does the observed data contradict the hypothesis? Formulate and test the appropriate hypotheses at the 1% significance level. Use the critical value approach. Clearly state and explain your conclusion within the context of the problem.
