If H 0 75 is rejected when the true population mean is 80, determine

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If H0 ∶ μ ≥ 75 is rejected when the true population mean is 80, determine the best answer below.
a) No error was incurred.
b) Type I error was incurred.
c) Type II error was incurred.
d) Both Type I and Type II errors were incurred.

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