The concrete canoe team does some analysis on their design and calculates that they need a compressive strength of 860 psi. they test several mix designs and chose one that has a sample mean of 900 psi with a standard error of the mean of 10 psi. the team wishes to be very conservative in their design and calculates a one-sided 99% confidence interval on the lower limit. what is this value?

874 psi

Explanation:

Given a sample mean (x') = 900,

and a standard error (SE) = 10

At 99% confidence, Z(critical) = 2.58

That gives 99% confidence interval as,

x' ± Z(critical) x SE = 900 ± 2.58 x 10

The value of the lower limit is,

900 - 25.8 = 874.2

≈ 874 psi

answer:

explanation:

assault rifle is a rapid-fire, magazine-fed rifle designed for military use. it is a shoulder-fired weapon that allows the shooter to select between semi-automatic (requiring you pull the trigger for each shot), fully automatic (hold the trigger and the gun continuously fires) or three-shot-burst modes.

answer:

a

explanation: