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:
As the test statistic calculated in the previous part came out to be as follows:
The can be calculated in excel by using the chi-distribution formula as shown below:
and the definition of .
Now, the table is not needed anymore.
is calculated as follows:
.
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