A survey of 300 randomly selected adults found that 72% exercise at least once per week, with a margin of error of ±5 percentage points at 95% confidence. Which of the following statements is a valid interpretation of this result?
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A
We are 95% confident that between 67% and 77% of all adults exercise at least once per week.
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B
95% of adults in the sample exercise between 67% and 77% of the time.
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C
There is a 95% probability that exactly 72% of all adults exercise at least once per week.
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D
We are certain that between 67% and 77% of all adults exercise at least once per week.