What is the effect of decreasing the alpha level (for example, from = 0.05 to = 0.01)?

a.

This action increases the likelihood of rejecting H₀ and increases the risk of a Type II error.

b.

This action decreases the likelihood of rejecting H₀ and increases the risk of a Type I error.

c.

This action decreases the likelihood of failing to reject H₀ and decreases the risk of a Type I error.

d.

This action increases the likelihood of failing to reject H₀ and increases the risk of a Type II error.