I am working on a project and I am having trouble verifying

I am working on a project and I am having trouble verifying some data. I have a survey for 29 people. 27 answered yes and 2 answered no. I think my mean is 1.07 for yes and 14.5 for no but I am looking for verification. I am also trying to figure out the variance and the standard deviation.

Solution

The mean for yes is: 27/29=0.931

The variance is: {0.931*0.069}/29=0.002

The mean for no is: 2/29=0.068

The variance is: {0.068*0.932}/29=0.002

The standard deviation is: sqrt of 0.002=0.044