Which of the following statements are valid null and alternative
Which of the following statements are valid null and alternative hypotheses? If they are invalid hypotheses, explain why.
a. H0 :  ≤ 210; HA:  > 210
b. H0: µ = 120; HA: µ ≠ 120
c. H0: p ≤ 0.24; HA: p > 0.24
d. H0: < 252; HA: µ > 252

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