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Statistics - Hypothesis Test

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A sample of 36 observations is selected from a normal population.
The average sample is 21 and the standard deviation of the sample is 5.
Perform the following hypothesis test using the significance level 0.05.
H₀: µ≤20
H₁: µ>20

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The expert provides a hypothesis test for sample statistics in normal population means. A complete, neat and step-by-step solution is provided.

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Update:

(a) It is one-tailed (Upper-tailed)

(b) Answered

(c) z = 1.2

(d) Answered

(e) p- value is ...

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