In: Statistics and Probability
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. Use the
two-sample t test at significance level 0.01 to test
H0: μ1 −
μ2 = −10 versus Ha:
μ1 − μ2 < −10 for the
following data: m = 6, x = 114.8,
s1 = 5.05, n = 6, y = 129.4,
and s2 = 5.33.
Calculate the test statistic and determine the P-value.
(Round your test statistic to two decimal places and your
P-value to three decimal places.)
t | = | |
P-value | = |
State the conclusion in the problem context.
Reject H0. The data suggests that the difference between mean stopping distances is less than −10.Reject H0. The data does not suggest that the difference between mean stopping distances is less than −10. Fail to reject H0. The data suggests that the difference between mean stopping distances is less than −10.Fail to reject H0. The data does not suggest that the difference between mean stopping distances is less than −10.