On wishes to test H₀ : μ =880 vs Hₐ : μ < 880. A random sample with size 10 produced x(bar)= 850, s = 20. Assume that the population follows a normal distribution. Which of the following is the corresponding rejection region with significance level .05?
a. (-[infinity], 1.833)
b. (1.833,[infinity])
c. (-[infinity],-1.645)
d. (1.96,00)
e. (-[infinity],-1.833)