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?

when σ = 10 and α = .05 than null hypothesis is reject  

Explanation:

given data

µ = 80

M = 88

solution

get know that sample mean of z-score formula that is

z =       ......................1

here X is sample mean  and M is population mean  and s = σ that is standard deviation

so If we take here s =  σ = 5 and α = .05

so put here value in equation 1 we get

z =    

z = 1.6

so that corresponding p value = 0.05

as that here significant result  

p ≤ 0.05

so that we can say null hypothesis is reject

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