How do I go about doing 2c?

Sunbucks also sells specialty tea blends. They recorded the retail price of the assorted tea blends package in a sample of 110 Canadian stores. Also recorded was whether the store also sold the leading competitor's assorted tea blend (1-yes and 2-no). Use the #2 Data Set

Test whether the variance of the sample of tea prices is significantly different than the previously assumed variance of 20.5