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

For what is the measure of the angle at the top of the shed? a. multiplication of areas b. squaring of areas c. addition of areas d. division of areas

Identify the graph of y = ln x + 1.

An office supply company conducted a survey before marketing a new paper shredder designed for home use. in the survey, 80 % of the people who tried the shredder were satisfied with it. because of this high satisfaction rate, the company decided to market the new shredder. assume that 80 % of all people are satisfied with this shredder. during a certain month, 100 customers bought this shredder. find the probability that of these 100 customers, the number who are satisfied is 69 or fewer.