What are the mean, variance, and standard deviation of these values: 92, 97, 53, 90, 95, 98? Round to the nearest tenth.
a) Mean: 92.5, Variance: 132.5, Standard Deviation: 11.5
b) Mean: 95, Variance: 156.7, Standard Deviation: 12.5
c) Mean: 93.8, Variance: 134.7, Standard Deviation: 11.6
d) Mean: 94.2, Variance: 144.5, Standard Deviation: 12