Listed below are the speeds(mi/h) measured from the southbound traffic on I-280. The speed limit is 65mph. 62, 61, 61, 57, 61, 54,  59, 58, 59, 69, 60, and 67 1. Construct a 99% confidence interval for the true speed on I-280. 2. Construcut a 90% confidence interva 3. What happens to the width of the confidence interval as the confidence level decreases?

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