Question

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?​

Answer 1

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

Step-by-step explanation:

given data

µ = 80

M = 88

solution

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

z =
`(X-M)/(s)` ......................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 =
`(88-80)/(5)`

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