A simple random sample of 30 items resulted in a sample mean of 10. The population standard deviation is o = 5. Round your answers to two decimal places.
a. What is the standard error of the mean, oi?
11
b. At 95% confidence, what is the margin of error?

Aline parallel to a triangle's side splits ab into lengths of x - 5 and x + 2. the other side, ac, is split into lengths of x and x + 12. what is the length of ac? a) 12 b) 24 c) 36 d)

Ineed i been stuck on this question since yesterday

Consider a cube that has sides of length l. now consider putting the largest sphere you can inside this cube without any point on the sphere lying outside of the cube. the volume ratio -volume of the sphere/ volume of the cube is 1. 5.2 × 10−1 2. 3.8 × 10−1 3. 1.9 4. 2.5 × 10−1 5. 3.8