The Sign Test Is Performed to Test $H _ { 0 } : m = 400$

Short Answer

The sign test is performed to test $H _ { 0 } : m = 400$ versus $H _ { 1 } : m < 400$ . There are 13 plus signs, 24minus signs, and 2 zeros.
a. What is the test statistic?
b. Is H₀ rejected at the $\alpha$ =0.05 level?
c. Is H₀ rejected at the $\alpha$ =0.01 level?