Assuming that you mean "simplified form", we have to cancel every common divisor of both numerator and denumerator.
36 is factored as
34 is factored as
So, the two numbers only have a factor 2 in common, meaning that the simplified form of this fraction is
Answer: (72.535, 76.665)
Step-by-step explanation:
The confidence interval for population mean is given by :-
, where = population standard deviation.
n= Sample size
= sample mean.
= Critical z-value (two-tailed)
Given :
n= 81
The critical values for 90% confidence interval :
Now, the confidence interval for population mean would be :
Hence, a 90 percent confidence interval estimatefor the average score of all students. : (72.535, 76.665)