Use McNemar S Test to Compare Two Proportions from Matched $A$

Short Answer

Use McNemar s Test to Compare Two Proportions from Matched -pairs Data
-A researcher wants to determine whether there is a difference between two sunscreen lotions. Participants in a marathon race on a hot, sunny day applied lotion $A$ to one arm and lotion $B$ to the other arm. The results are shown in the table.


Is there a difference in the effectiveness of the two lotions in preventing sunburn? Use the critical-value method and the $\alpha = 0.05$ level of significance.