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Textbook Expert
Textbook ExpertVerified Tutor
7 Dec 2021

Given information

The given frequency distribution is :

Where X is represented as the number of colours on national flags.

Here, Confidence Interval is considered as 95%.

Step-by-step explanation

Step 1.

TO KNOW WHAT IS AREA OF THE TAIL :

The area of the tail is the probability of rejecting the null hypothesis when true.  The area of the tail is also known as Significant Level or Level Of Significant (LOS). 

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