A common factor of both 126 and 399 is 3 so we can divide both numbers by 3.
126 / 3 = 42
399 / 3 = 133
A common factor for both 42 and 133 is 7 so we can divide both numbers by 7.
42 / 7 = 6
133 / 7 = 19
19 is a prime number so we can't reduce it anymore, therefore 126/399 in its simplest form is 6/19
Answer: (1.55, 6.45)
Step-by-step explanation:
The confidence interval for population mean is given by :-

Given : Significance level : 
Critical value : 
Sample size : n=41
Sample mean : 
Standard deviation : 
Then, 99% confidence interval for population mean will be :_

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There's no this kind of number because when a number is a square number, it equals its square root multiplies itself, which contradicts with the definition of prime number (<span>A </span>prime number<span> is a natural </span>number <span>greater than </span>1<span> that has no positive divisors other than </span>1<span> and itself)</span>. There's only 1=1×1, but since 1 isn't included in prime number, there's no answer to your question.