The standard deviation for SAT tests is known to be 100. Zoe takes a sample of 64 people and calculates a 99% confidence interval. How big is her margin of error

32.2

Step-by-step explanation:

Margin of Error = Zcritical * √(σ² / n)

σ = standaed deviation. ; sample size = 64

α = 99%

Zcritical at 99% confidence interval = 2.576

Margin of Error = 2.576 * √(100^2/64)

Margin of Error =2.576* 100/8

Margin of error = 2.576 * 12.5

= 32.2

10/60

step-by-step explanation:

if you divide 10 by 60 the answer is 0.166666 while if you divide or solve the other problems it equals 0.6