Question

assuming that the sample come from the normal distributions find the margim of error. E given the following

B.n=16,X =50, s=4.2, 95% confidence

Answer 1

Based on the information provided, the significance level is $\alpha = 0.05,$ $df=n-1=15$ and the critical value for a two-tailed test is $t_c =2.131449.$

$$E=t_c\times\dfrac{s}{\sqrt{n}}=2.131449\times \dfrac{4.2}{\sqrt{16}}$$

$$=2.238$$