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Question 16 Tries remaining: 3 Marked out of 3.00 V7 Flag question Having done poorly on a particular exam in a junior high school, 23 students decide to write the exam again to try and improve their mark. Results are given in the following table. Student n 7 Average Standard deviation 7 AuanmiiAn 23 6O 7' 33 Anempt2(A2) A 23" 65 "'43 Difference (d = A1 23 5.0 2.7 2) (3) Find a 98% confidence interval for the difference in mean scores between attempt 1 and attempt 2. (Round your answers to 4 decimal places, if needed.) C3 f \"i (b) Based on this confidence interval, can we conclude there is a difference in mean scores between attempt 1 and attempt 2? O Yes, since the interval contains 0. O No, since the interval contains 0. 0 Yes, since the interval is completely below 0. O No, since the interval is completely below 0. ' Check , Last saved at 20222138 Save Progress : Previous page