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

b. check your rearview mirror

explanation:

d would be the most obvious choice to this question. leaders are supposed to herd their underlings like a shepherd to sheep. a leader should also listen to others when they are talking to one other to gain a better understanding of their mission and surroundings.

explanation: