Two coffee-vending machines are studied to determine whether they distribute the same amounts. Samples are taken and the number of ounces is recorded for each machine. On average, can we conclude that the machines distribute the same amount? Test at α = .05.
A) Reject the null hypothesis.
B) Do not reject the null hypothesis.

Question

Two coffee-vending machines are studied to determine whether they distribute the same amounts. Samples are taken and the number of ounces is recorded for each machine.  On average, can we conclude that the machines distribute the same amount? Test at α = .05.
A) Reject the null hypothesis. 
B) Do not reject the null hypothesis.

Quizplus · Accepted Answer

We cannot reject the null hypothesis that the amounts are equal. 11ead627_0a06_aeea_93a1_75d3854b8a55_TB7056_00 T_A = 116 Because n_A = n_B,T = T_A = 116 From the Wilcoxon Rank Sum Table for n_A = 10 and n_B = 10, T_U = 131 and T_L = 79. Reject H₀ if T ≤ T_L or T ≥ T_U; neither condition holds, so we cannot reject the null hypothesis.

Two Coffee-Vending Machines Are Studied to Determine Whether They Distribute