Determine Whether the Samples Are Independent or Dependent Use a 002 Significance Level to Test the Claim That the Mean

question 49

Essay

Determine whether the samples are independent or dependent.
-A researcher was interested in comparing the response times of two different cab companies. Companies A and
B were each called at 50 randomly selected times. The calls to company A were made independently of the calls
to company B. The response times for each call were recorded. The summary statistics were as follows: $$\begin{array} { | l c c | } \hline & \text { Company A } & \text { Company B } \\\hline \text { Mean response time } & 7.6 \text { mins } & 6.9 \text { mins } \\\text { Standard deviation } & 1.4 \text { mins } & 1.7 \text { mins } \\\hline\end{array}$$ Use a 0.02 significance level to test the claim that the mean response time for company A is the same as the
mean response time for company B. Use the P-value method of hypothesis testing.

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