An auto shop wants to examine the proportion of customers that have to return after an appointment. Last year, an examination of 416 customers found that 27.9% had to return after an appointment. You instituted some changes at the auto shop this year, and found from a sample of 335 customers that 30.2% had to return after an appointment. You want to conduct an analysis to determine if there has been an increase in the proportion of customers that need to return after an appointment since the past year, with a significance level of 5%. Using this information, what is the test statistic of your analysis? For the purposes of this analysis, use Pcurrent year - Plast year. Round any intermediate numbers to four decimal places and choose the closest choice to your answer. O 2.19 1.645 1.86 0.69 1.03