Suppose μ_{1} and μ_{2} are two mean stopping
distance of km/hr for 50km/hr for cars of a certain type equipped
with two different types of braking systems. Use the two sample t
test at significance level of 0.01 to test. H_{0}:
μ_{1} - μ_{2} = 0 Verses. H_{1}:
μ_{1} - μ_{2} < 0 for the following
statistics.
n_{1} = 6 x ̅_{1} = 116 S_{1} = 5.0
n_{2.} = 6 x ̅_{2} = 129 S_{2} = 5.5
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