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Problem

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Textbook Expert
Textbook ExpertVerified Tutor
15 Dec 2021

Given information

Use the following information to answer the next five exercises:
A teacher predicts that the distribution of grades on the final exam will be and are recorded in     
The actual distribution for a class of  is in   

Step-by-step explanation

Step 1.

It is given in the problem that the total frequencies are . Therefore, we multiply each frequency by and calculate the following table as shown:

Now to calculate the test statistic the calculation is as done in the following table:

N0.1 Expected Values Observed values (O-E) (O-E)^2 (O-E)^2/E
1 5 7 2 4 0.8
2 6 7 1 1 1.66667
3 7 5 -2 4 0.571428
4 2 1 -1 1  
5       Total   

Therefore, the  

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