Problem

The weights (in pounds) of elght vehicles and the variabilities of their braking distances (in feet) when stopping on a wet surface are shown in the table. At α=0.01, is there enough evidence to conclude that there is a significant linear cortclation batween vehicle weight and variability in braking distance on a wet surface?
Unknown environment 'tabular'

Setup the hypothesis for the test
H0p=0Hap=0

Calculate the test statistic
t=33 (Round to two decimal places as needed)

Cilculate the Pivalue
 P.value = (Round to three decirtial places as needect) 

Answer

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Answer

Final Answer: The p-value is 5.15×108.

Steps

Step 1 :Setup the hypothesis for the test: H0:p=0 (There is no correlation) and Ha:p0 (There is a correlation).

Step 2 :Calculate the test statistic: t=33.

Step 3 :Calculate the degrees of freedom for this test: df=n2=82=6.

Step 4 :Calculate the p-value using the t-distribution with the given test statistic and degrees of freedom: p=5.151762394461912×108.

Step 5 :Compare the p-value with the significance level α=0.01. Since the p-value is much less than the significance level, we reject the null hypothesis.

Step 6 :Conclude that there is a significant linear correlation between vehicle weight and variability in braking distance on a wet surface.

Step 7 :Final Answer: The p-value is 5.15×108.

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