a) Given the following hypotheses, determine the p-value when xbar = 21, n = 25, and σ = 5. ...

a) Given the following hypotheses, determine the p-value when xbar = 21, n = 25, and σ = 5.
Ho : µ = 20
H1 : µ ≠ 20
b) repeat part (a) with xbar = 22.
c) repeat part (a) with xbar = 23.
d) Describe what happens to the value of the test statistic and its p-value when the value of xbar increases.