1. A data is collected from Lab A, and this data is considered as the reference (standard). Sample mean is 12, SD is 2.4 and sample size if 16. Another set of data from Lab B have a mean of 10, SD_B is 2.4 and n_B=16. If we choose a = 0.05, do you think mean of Lab B is close enough to be considered the "same" as that of Lab A? Why?

Same as problem 4), except SD of Lab A is SD_A=4.4. If we choose a = 0.05, do you think the mean of Lab B is close enough to be considered the "same" as that of Lab A? Why?