Asatellite dish used to receive television signals has a parabolic cross-section as shown below. incoming signals that are parallel to the axis of the parabola (aka: axis of symmetry) are reflected to its focus. thus, the incoming signal is magnified. find an equation of the parabola.
focus: (4,0)
vertex: (0,0)

Astudy found that the variance in the number of vehicles owned or leased by subscribers to a magazine is .094. assume a sample of 12 subscribers to another magazine provided the following data on the number of vehicles owned or leased: 1,1,1,0,3,2,1,1,2,1,0, and 1 a) compute the sample variance in the number of vehicles owned or leased by the subscribers (to 4 decimals). b)test the hypothesis to determine whether the variance in the number of vehicles owned or leased by subscribers of the other magazine differs from .calculate the value of the test statistic (to 3 decimals).