In class of 20 students a teacher predicts this distribution

Last updated: 5/16/2023

In class of 20 students a teacher predicts this distribution of final exam grades based on past experience Grade Frequency A 5 6 7 2 The actual class final exam grades are here Grade Frequency A 7 B 7 C 5 D F 1 At 0 05 significance do the actual class final exam grades fit the teacher s predictions a Which is the null hypothesis B C D F OHO The class grades are independent of the teacher s predictions OHO The class grades fit the teacher s predictions OHO The class grades are dependent of the teacher s predictions OHO The class grades fit the teacher s predictions b Which is the alternative hypothesis OH1 The class grades are dependent on the teacher s predictions OH1 At least one grade category does not fit the teacher s predictions O H1 All grade categories do not fit the teacher s predictions O H1 The class grades are independent on the teacher s predictions c What is the test statistic Round to 2 decimal places d What are the degrees of freedom needed to find the p value e What is the p value Round to 4 decimal places f Which is the decision Beject the null hypothesis