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.