The following numbers of traffic collisions by month at an intersection were gathered in consecutive years before and after a traffic signal was installed. Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Stop Sign 8 7 9 6 6 5 3 6 8 10 12 Traffic Signal 7 5 4 5 5 4 5 9 7 7 Test the claim that the new traffic signal is effective in reducing traffic collisions at this intersection using a 0.01 significance level. Assume the requirements for a hypothesis test are met. (a) Use Excel to calculate the needed sample statistics. (b) State the null and alternative hypotheses and determine which one corresponds to the claim that is being tested. (c) Determine the appropriate distribution to use and calculate the test statistic. Round to two decimal places. (d) Calculate the P-value and state the decision of the hypothesis test. (e) State the conclusion as a complete English sentence in the context of the original claim. Edit View Insert Format Tools Table 12pt Paragraph B