Answer to Question #248885 in Statistics and Probability for blossomqt

Question

The strength of concrete depends, to some extent, on the method used for drying. Two different drying methods showed the following results for independently tested specimens (measurements in psi): Do the methods appear to produce concrete with different mean strengths? Use 𝛼 = 0.05 .

MethodI 𝑛! =37 𝑥̅! =3.25 𝑠! =2.10 MethodII 𝑛" =40 𝑥̅" =3.24 𝑠" =1.90