A state safety official wants to estimate the proportion of licensed cars in NC that have worn tires. He randomly selects 5 mechanic shops and he looks at the first 100 car records he finds to see what work was done. He finds that 45% of them have worn tires.A state congressman wants to know the proportion of NC voters who support higher taxes to pay for state parks. He randomly selects 200 voters, and he asks them if they support higher taxes for state parks. 15% of the selected voters supported the higher taxes.A police officer wants to know the proportion of licensed drivers who have had a speeding ticket within the last five years. He randomly selects 30 drivers from a database of all licensed drivers, and checks their records. He finds that 30% of the people had speeding tickets within the last five years.A politician wants to know the proportion of registered women voters that are registered with the Democratic Party. He looks at voter registration, randomly selects 100 women, and sees that 56% of women are registered with the Democratic Party.
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