A civil engineer is analyzing the compressive strength ofconcrete. Compressive strength is normally distributedwith σ2=1000 psi2.σ2=1000 psi2. A random sampleof 12 sample specimens has a mean compressive strengthof x⎯⎯=3226x¯=3226 psi.
Round your answers to 1 decimal place.
(a) Calculate the 95% two-sided confidence interval on the truemean compressive strength of concrete.
Enter your answer; 95% confidence interval, lowerbound ≤μ≤≤μ≤ Enter your answer; 95% confidence interval,upper bound
(b) Calculate the 99% two-sided confidence interval on the truemean compressive strength of concrete.
help me out asap with all steps please with rightanswers
A civil engineer is analyzing the compressive strength of concrete. Compressive strength is normally distributed with σ2
-
answerhappygod
- Site Admin
- Posts: 899603
- Joined: Mon Aug 02, 2021 8:13 am