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Paint used to paint lines on roads must reflect enough light to be clearly visible at...

Paint used to paint lines on roads must reflect enough light to be clearly visible at night. Let μ denote the true average reflectometer reading for a new type of paint under consideration. A test of H0: μ = 20 versus Ha: μ > 20 based on a sample of 15 observations gave t = 2.9. What conclusion is appropriate at each of the following significance levels?

(a) α = 0.05

Reject H0 OR   Fail to reject H0

(b) α = 0.01

Reject H0 OR Fail to reject H0

(c) α = 0.001

Reject H0 OR Fail to reject H0

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