Hypothesis Testing using one-sample t-test

. An advocacy group hypothesizes that the police are issuing more speeding tickets at busy intersections in the city compared to the national average. Below are the number of speeding tickets issued in one day across 7 busy intersections in the city. If the daily national average for speeding tickets at busy intersections is 12, is the position of the advocacy group supported by the evidence? Calculate the t-value and compare it to the critical t-value and indicate whether the test is significant or not. Assume a one-tailed hypothesis with = .01. (3 marks)

Tickets Issued

16 11 20 22 15 19 23

Calculate the effect size (i.e., Cohen's d) and indicate the relative size of the effect. (1 mark)