Lower-tail test
Upper-tail test
This means that only values for the sample mean that are greater than 50 can lead us to reject the null hypothesis in favour of the alternative.
This means that only values for the sample mean that are less than 50 can lead us to reject the null hypothesis in favour of the alternative.
H0: μ = 50 OR μ ≥ 50
H1: μ < 50
H0: μ = 50 OR μ ≤ 50
H1: μ > 50
Now only α not
Now only α not
Critical value
Critical value
8.5 upper and lower tail
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Transcript
Lower-tail test
Upper-tail test
This means that only values for the sample mean that are greater than 50 can lead us to reject the null hypothesis in favour of the alternative.
This means that only values for the sample mean that are less than 50 can lead us to reject the null hypothesis in favour of the alternative.
H0: μ = 50 OR μ ≥ 50 H1: μ < 50
H0: μ = 50 OR μ ≤ 50 H1: μ > 50
Now only α not
Now only α not
Critical value
Critical value