Question
The Toyota company claims that 25% of their drivers own a Corolla. A 95% confidence interval is created from a sample of data that predicts
The Toyota company claims that 25% of their drivers own a Corolla. A 95% confidence interval is created from a sample of data that predicts the proportion of all Toyota drivers who own a Corolla.
From a sample of 100 Toyota drivers, the confidence interval had a lower bound of 0.220 and an upper bound of 0.260.
a) Given this confidence interval, (0.220, 0.260), what was the sample proportion used to "create this" confidence interval?
b) Given this confidence interval, (0.220, 0.260), what was the margin of error used to "create this" confidence interval?
c) Does this confidence interval support the idea that Toyota is incorrect about what percentage of their drivers own a corolla? (Type Yes or No)
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