A statistician read that at least 77% of the population oppose replacing $1 bills with $1 coins. To see if the chain is valid, the statistician selected a sample of 80 people and found that 55 were opposed to replacing the $1 bills. At a= 0.01, test the claim that at least 77% of the population are opposed to the change.

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step-by-step explanation:

distance covered by pamela in 9 l of fuel = 99km

let us apply unitary method here.

distance covered by pamela in 1 l of fuel =99/9 =11 km

now let us find distance covered by pamela if she has 12 l of fuel.

distance covered in 12 l = distance covered in 1 l of fuel * 12

we know that distance covered by here in 1 l is 11 km.

so distance covered in 12 l of fuel = 11*12 = 132 km.