Question

Using traditional methods it takes 11.9 hours to receive a basic driving license. A new license training method using Computer Aided instruction (CAI) has been proposed. A researcher used the technique on 27 students and observed that they had a mean of 11.7 hours with a standard deviation of 1.6. Is there evidence at the 0.1 level that the technique reduces the training time? Assume the population distribution is approximately normal. Step 2 of 5: Find the value of the test statistic. Round your answer to three decimal places. Answer Tables Keypad Keyboard Shortcuts

Please also find p value, reject or fail to reject

Answer 1

Based the information above bave, we provided hours Moall. 2 и 11.7 hrs N s 1.6 z will be, The ny po thesis Ha : Lu 211.9 < 11.9 Hii M df n-1 ab, Using az 0.1 tëz + 1.315 valne t nc critical is calculated test statistic The as xl Ho t z slun (1. 1 - 11.9 1.6 I 52

to 3 decimal -0.6495 Grounding placee} 2 -0.65 0 0.650 test statistic the s-o.65} . P { teao) The P-value 0.2609 n -oobs >azo.10) o.aboa since P-value Ho. to reject fail we sufficient is not there isi That to conclude that evidence reduces the method the ne W training time