Consider a normal population distribution with the value of σ known. (a) what is the confidence level for the interval x ± 2.81σ/ n ? (round your answer to one decimal place.)

Find the radius of a circle that has a circumference of 16. the formula for the circumference of a circle is c = 2tr, where r is the radius and c is the circumference. the equation solved for r is r = c over 2π. r=4 r= 8 r=12 r= 16