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Suppose μ1 and μ2 are true mean stopping distances at 50 mph for cars of a...

Suppose μ1 and μ2 are true mean stopping distances at 50 mph for cars of a certain type equipped with two different types of braking systems. The data follows: m = 10, x = 116.8, s1 = 5.28, n = 7, y = 129.6, and s2 = 5.47. Calculate a 99% CI for the difference between true average stopping distances for cars equipped with system 1 and cars equipped with system 2. (Give answers accurate to 2 decimal places.)

Lower limit
Upper limi
Math   Statistics-And-Probability   
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Answer #1

Lower limit = -20.58

Upper limit = -5.02

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