Given information
Use the following information to answer the next five exercises. A study was conducted to test the effectiveness of a software patch in reducing system failures over a six-month period. Results for randomly selected installations are shown in Table . The “before” value is matched to an “after” value, and the differences are calculated. The differences have a normal distribution. Test at the significance level.
Step-by-step explanation
To find the press STAT and
Twice to select .
Press followed by to enter stat list editor,
Enter the list for before and after values and in the third list, go-to name list and enter and then press ENTER after each value. The data is given below,
Once all the sample entries are made press to obtain the results as,
Test level significance is
Therefore, not to reject the null hypothesis.
And the is .