Answer:
9/11 I think!
Step-by-step explanation:
54/66= 9/11
4 because you take 2²= 2 times 2 = 4
Do what is in brackets first, then the multiplication.
Answer:
Step-by-step explanation:
The answer is 1.25
Answer: 2.093
Step-by-step explanation:
As per give , we have
Sample size : n= 20
Degree of freedom : df= n-1=19
Significance level : 
Since , the sample size is small (n<30) so we use t-test.
For confidence interval , we find two-tailed test value.
Using students's t-critical value table,
Critical t-value : 
Thus, the critical value for the 95% confidence interval = 2.093