B,C,D are all equivalent.
Answer:
yes, the Temperature is 5 F
Step-by-step explanation:
-3 + 8 = 5
Answer:
118°
Step-by-step explanation:
Line b is a perpendicular bisector so 90°+28°=118°
Complete Question
A civil engineer is analyzing the compressive strength of concrete. Compressive strength is normally distributed with
. A random sample of 12 sample specimens has a mean compressive strength of
. Round your answers to 1 decimal place. (a) Calculate the 95% two-sided confidence interval on the true mean compressive strength of concrete.
Answer:

Step-by-step explanation:
From the question we are told that:
Sample size 
Standard deviation 
Sample mean 
Confidence level =95%
significance level
From table \alpha 0.05
Gives
Generally the equation for confidence interval is mathematically given by


