a-nutritionist-tests-a-new-diet-plan-on-1212-individuals-and-records-the-weight-

Question

A nutritionist tests a new diet plan on $12$ individuals and records the weight change (after − before) for each person. $6$ participants lost weight, $4$ participants gained weight, and $2$ participants had no change. What is the test statistic for the sign test?

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A nutritionist tests a new diet plan on 1212 individuals and records the weight change (after − before) for each person. 66 participants lost weight, 44 participants gained weight, and 22 participants had no change. What is the test statistic for the sign test?

A nutritionist tests a new diet plan on $12$ individuals and records the weight change (after − before) for each person. $6$ participants lost weight, $4$ participants gained weight, and $2$ participants had no change. What is the test statistic for the sign test?