Sử dụng mẫu có 42 quan sát, trung bình mẫu là 22.05 ; phương sai mẫu là 1.38, độ tin cậy 95%, giá trị tối đa của trung bình tổng thể là bao nhiêu, lấy U0,05 =1.645 có giá trị gần giá trị nào nhất trong các giá trị sau

The surface area (sa) of a cube with a as the length of each of its sides is given by the formula . if the surface area is known, how can you rewrite the formula to find its side?

∠aed is formed inside a circle by two intersecting chords. if minor arc bd = 70 and minor arc ac = 180, what is the measure of ∠ aed? a) 45° b) 50° c) 55° d) 60°

What is the measure of angle z in this figure? enter your answer in the box. z = ° two intersection lines. all four angles formed by the intersecting lines are labeled. clockwise, the angles are labeled 43 degrees, x degrees, y degrees, and z degrees.