4. Express the confidence interval 14.26 + 3.2 as an interval. PO he ii needon led joine ain in swapms sonsheis pamelas All only .C] experiment to test their ability to determine when 60 seconds has passed. Fort student yielded a sample mean of 58.3 secs. Assume that o = 9.5 sec. Construct a 95% confidence interval estimate of the population mean of all statistic students X = Z = PC Standard Error = Margin of error = Upper Bound = Lower Bound = Confidence Interval = STATISTICAL INTERPRETATION PO REAL WORLD INTERPRETATION 6. Trials in an experiment with a polygraph include 98 results that include 24 cases of wrong results and 74 cases of correct results. Use a 1% level of significance to test the claim that such polygraph results are correct less than 80% of the time. Step 1 Identify variable and parameter with variable and words X= u or p = Step 2 Identify Null Hypothesis, Alternative Hypothesis, (words and algebraically) and Level of Significance HO Ha a= Step 3 Check for normality Can you be confident in your decision? PO Step 4 Find sample statistic, test statistic and pvalue. Draw a picture Xor p E SE = Zor T - PO -3 -2 -1 0 1 2 3 PO P Value = dec % Step 5 Make a conclusion about null hypothesis PC Step 6 Interpret you alternative hypothesis PO Based on the results, should polygraph test results be prohibited PC as evidence in trials