The braking ability was compared for two 2012 automobile models. Random samples of 64 automobiles were tested for each type. The recorded measurement was the distance (in feet) required to stop when the brakes were applied at 50 miles per hour. These are the computed sample means and variances:

Do the data provide sufficient evidence to indicate a difference between the mean stopping distances for the two models?

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Model Model Il x1 = 118 x2 = 109 s-102 s = 87