Hypothesis test help.

#1
The temperature in degrees Fahrenheit of a random group of healthy adults are

97.0 97.4 99.3 97.7 98.6 99.7 97.5 98.7 96.9 97.9 97.3 99.7 97.8 99.5 97.6 97.3 97.3 96.8

At the 0.01 level of significance can we conclude (by using a sign test) that the median temperature of healthy adult is 98.6 degrees f?

value of test statistic= ?

critical value=?

decicision=?

Can you conclude that the average temp is 98.6? yes or no


So my problem is, I thought that there needed to be two groups for a sign test? Please help!