Suppose that 22.24% of all vehicles on the road get a fuel economy of at least 35 miles per gallon (MPG). You conduct an observational study on a stretch of road outside of campus and record the make and model of 796 vehicles over a month long period. What is the probability that less than 21.34% of the cars you observed get at least 35 MPG?
Show how to get the answer using a Ti-84 calculator please, step by step.