Answer: (11.95, 14.11)
Explanation:
Let x be a random variable that represent the number of years of education.
Given: Sample size : n= 26
Sample mean : 
Sample standard deviation : s = 3.22
Significance level : 
Degree of freedom: df = n-1 = 25
Critical t-value for 
and df = 25 will be
90% confidence interval for mean:
A 90% confidence interval for the mean number of years of education = (11.95, 14.11)
Answer: federalism, separation of powers, checks and balances, and the large and small states both treated equally.
Explanation:
The Constitution guarded against tyranny in ways such as having the federalism, separation of powers, checks and balances, and the large and small states both treated equally.
B. population of the region
I dont know what you mean by this but an economy is wealth and resources of a country or region, especially in terms of the production and consumption of goods and services.
