On wishes to test H0 : ? = 880 vs Ha : ? < 880. A random sample with size 20 produced x? = 850,

Hello students here sample size n is equal to 20 and degrees of freedom Df is equal to n minus 1

Question

On wishes to test H0 : ? = 880 vs Ha : ? < 880. A random sample with size 20 produced x? = 850, s = 20. Assume that the population follows a normal distribution. Which of the following is the corresponding rejection region with significance level .01? (2.539, ?) (-?, -2.539) (-?, 2.539) (-?, -2.33) (2.575, ?)

          On wishes to test H0 : ? = 880 vs Ha : ? < 880. A random sample with size 20 produced x? = 850, s = 20. Assume that the population follows a normal distribution.
Which of the following is the corresponding rejection region with significance level .01?
(2.539, ?)
(-?, -2.539)
(-?, 2.539)
(-?, -2.33)
(2.575, ?)

On wishes to test H0 : ? = 880 vs Ha : ? < 880. A random sample with size 20 produced x? = 850, s = 20. Assume that the population follows a normal distribution.
Which of the following is the corresponding rejection region with significance level .01?
(2.539, ?)
(-?, -2.539)
(-?, 2.539)
(-?, -2.33)
(2.575, ?)

Added by Alyssa W.

Elementary Statistics a Step by Step Approach

Allan G. Bluman 9th Edition

Thanks for your feedback!

On wishes to test H0 : μ = 880 vs Ha : μ < 880. A random sample with size 20 produced x̄ = 850, s = 20. Assume that the population follows a normal distribution. Which of the following is the corresponding rejection region with significance level .01? (2.539, ∞) (-∞, -2.539) (-∞, 2.539) (-∞, -2.33) (2.575, ∞)