A manufacturer of TV sets claims that at least 98% of its TVsets can last more than 10 years without needing a single repair.In order to verify and challenge this claim, a consumer grouprandomly selected 800 consumers who had owned a TV set made by thismanufacturer for 10 years. Of these 800 consumers, 60 said thattheir TV sets needed some repair at least once. a. Is theresignificant evidence showing that the manufacturer’s claim isfalse? Test using α = 0.01. b. Do the data support that themanufacturer’s actual no-repair rate does not even reach 94%? Use α= 0.01. need to know how the variance is found step by step
