A 95% confidence interval for the true mean difference (sun – car) in the time it takes to get brain freeze is 8.607 seconds to 37.06 seconds. Based on this confidence interval, is it reasonable to claim that brain freeze tends to occur more quickly when eating Italian ice in an air-conditioned car than while sitting in the sunshine? No, 0 is not contained in the confidence interval. Yes, 0 is not contained in the confidence interval. No, the confidence interval only contains positive values. Yes, the confidence interval only contains positive values.
A group of six students decides to conduct an experiment about "brain freeze,” a phenomenon that often occurs when eating something cold. The students each flip a coin. If they flip heads, they eat a cup of Italian ice as fast as they can while sitting in an air-conditioned car. If they flip tails, they eat a cup of Italian ice as fast as they can while sitting outside in the sunshine. After a recovery period, they each complete the opposite treatment. The students record the amount of time it takes, in seconds, for them to experience brain freeze under each condition.
A 95% confidence interval for the true
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