A Researcher Administers a Treatment to a Sample of Participants

Multiple Choice

A researcher administers a treatment to a sample of participants selected from a population with µ = 80.If the researcher obtains a sample mean of M = 88,given the same alpha level,which combination of factors is most likely to result in rejecting the null hypothesis?​

A) ​σ = 5 and n = 25
B) ​σ = 5 and n = 50
C) ​σ = 10 and n = 25
D) ​σ = 10 and n = 50