Answer:
60 in²
Step-by-step explanation:
Area = base × height
= 15×4 = 60in²
Answer:
0.143059384
Step-by-step explanation:
=> 
=> 
=> 
=> 
=> 0.143059384
Answer:c
Step-by-step explanation:
Answer:
The marginal error is 2.355
Confidence interval is 
The LB and UB are 34.645 and 39.3555 respectively.
Step-by-step explanation:
Consider the provided information.
n = 49, s = 8.2 c = 95%and 
Degree of freedom is: n-1 = 49-1 = 48.

From the table 
Marginal error is:





Hence, the marginal error is 2.355.
Part (B)
95% confidence interval estimate



Thus, the LB and UB are 34.645 and 39.3555 respectively.