*** Note the following information is used for questions 5 and 6 ***. A random sample of 200 children found that 25% of the sample have ADHD. Based on this study, is there evidence that the true population proportion of children who have ADHD is different than 20%? Use a significance level of 0.05.

Calculate the test statistic for this hypothesis test. (Keep a minimum of 4 decimal places while you are doing the calculations but round your final answer to 2 decimal places)