Trong một cuộc khảo sát 64 khách hàng ở một tiệm ăn nhanh, thời gian đợi trung bình là 3 phút và độ lệch chuẩn là 1,5 phút. Với độ tin cậy 98%, tìm khoảng tin cậy cho thời gian đợi phục vụ
trung bình của tiệm ăn này. Biết thời gian đợi phục vụ là biến ngẫu nhiên có phân phối (xấp xỉ)
chuẩn.

4.     chef a says that broth should be brought to a boil. chef b says that broth should be kept at an even, gentle simmer. which chef is correct? a. neither chef is correct. b. chef a is correct. c. both chefs are correct. d. chef b is correct. student c   incorrect which is right answer

Carey company is borrowing $225,000 for one year at 9.5 percent from second intrastate bank. the bank requires a 15 percent compensating balance. the principal refers to funds the firm can effectively utilize (amount borrowed − compensating balance). a. what is the effective rate of interest? (use a 360-day year. input your answer as a percent rounded to 2 decimal places.) b. what would the effective rate be if carey were required to make 12 equal monthly payments to retire the loan?

Gary lives in an area that receives high rainfall and thunderstorms throughout the year. which device would be useful to him to maintain his computer?