Investigation 2: Ezpass on I-66 Continued Transportation engineers determined that to help ease traffic, they would set

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Investigation 2: Ezpass on I-66 Continued Transportation
engineers determined that to help ease traffic, they would set up
tolls for solo drivers during rush hour times on Route I-66 inside
the Capital Beltway (I-495). Carpooling drivers with the proper
Ezpass would drive free. The toll program began in December 4,
2017. To test the claim that fewer vehicles would use Route I-66
after the program began, a count of the number of vehicles were
collected from two random samples. Both samples were taken on the
first Monday of each month for an entire year before and after the
toll program was implemented. The data set is called “Number of
Vehicles 2” and we will use 𝛼 = 0.05 in this
investigation
i) Calculate the p-value using the T-calculator in StatCrunch
(Stat  Calculators  T). Present the T-Calculator image in your
solutions document.
j) Use StatCrunch Stat  T Stats  Paired and enter “2018” for
Sample 1 and “2017” for Sample 2 to verify your test statistic from
part (g) and your p-value in part (i). Copy the output into your
solutions document.
k) State your decision whether you reject or do not reject the
null hypothesis and the reason for your decision in one
sentence.
l) State your conclusion in context of the problem in one or two
complete sentences.
m) Compare the standard error from the StatCrunch output in part
(j) to the standard error obtained in part (h) of Investigation 1.
How did the different study designs affect the outcome of each
hypothesis test? Answer these in two or three sentences.
Given Data from Stat Crunch:
January