Question

Hi, can you help me answer this question please, thank you!

Answer 1

Data;

n=31

x=33

s=2

Critical value

Use t-score with degrees of freedom (df) of n-1

df=31-1=30

Critial value: 2.45726

Multiply the critical value by the standard deviation (s):

`2.45726*2=4.91452`Then, the margin of error at 98% confidence is 4.91